Seiko Astron Buyer’s Guide 2026: Is It Worth It? Battery, GPS Sync, Sizing & Every Model

Quick answer: The Seiko Astron is a titanium GPS Solar watch that sets itself to the exact local time anywhere on Earth using satellite signals and runs entirely on light, so it never needs a routine battery change. It is worth it if you travel, value precision, or simply want a high-tech luxury watch you never have to set or wind. At Lexor Miami, an authorized Seiko Luxe dealer in Miami, Florida, current Seiko Astron models range from $2,300 to $2,900, ship free within the contiguous U.S., and come brand new with the full manufacturer's warranty.

If you have been researching the Seiko Astron, you have probably run into the same questions everyone asks before buying: Does it have a battery? Will it sync indoors? Is it too big? Is it a real luxury watch, or just an expensive Seiko? And how does it compare with the Citizen Satellite Wave or a Grand Seiko quartz? This guide answers all of them in one place, using Seiko's official specifications and the six Astron references we currently carry in our Miami showroom and online store. Whether you are a frequent flyer out of MIA, a collector in Brickell or Coral Gables, or shopping from anywhere in the U.S., you will finish this article knowing exactly which Astron fits your wrist and your life.

Shop Seiko Astron Watches at Lexor Miami

What Is the Seiko Astron?

The Astron name carries more history than almost any other in modern watchmaking. In December 1969, Seiko released the original Quartz Astron, the first quartz wristwatch ever sold to the public. That single watch changed the industry: within a decade, quartz accuracy had become the global standard and traditional watchmakers were forced to rethink everything.

In 2012, Seiko revived the Astron name for a new kind of breakthrough: the world's first GPS Solar watch. Instead of relying on a terrestrial radio signal from a single atomic clock station, the new Astron listened to the GPS satellites orbiting the Earth. That meant it could receive the correct time anywhere on the planet, from the middle of the Atlantic to a mountaintop in the Andes, and identify which time zone it was in.

Those first GPS Solar models were large, at around 47mm across and more than 16mm thick. Today's Astron is a very different watch. Seiko has shrunk the movements dramatically, and the current lineup sits between roughly 41mm and 43mm, with cases around 12mm thick. Modern Astron watches combine an angular, integrated-bracelet design with super-hard coated titanium, sapphire crystals, and textured dials that nod to the quartz crystal at the heart of the original 1969 watch.

In short, the Seiko Astron is Seiko's flagship technology watch. It sits inside the Seiko Luxe family alongside Prospex, Presage, and King Seiko, and it is the collection Seiko uses to show what the future of everyday timekeeping looks like.

Seiko Astron vs. King Seiko: Not the Same Watch

One point of confusion we hear often in our Miami store: some retailers, including parts of our own catalog naming, label Astron models with "King" in the title. To be clear, Astron and King Seiko are two separate Seiko collections. King Seiko is a mechanical dress-sport line that revives Seiko's 1960s design heritage. Astron is a GPS Solar quartz line focused on technology and travel. If you want satellite-controlled accuracy and solar power, you want an Astron. If you want a hand-finished automatic movement, explore our King Seiko collection instead.

How Does Seiko Astron GPS Solar Technology Work?

Every Seiko Astron does two jobs that no ordinary quartz watch can do on its own: it powers itself from light, and it corrects itself from space.

The solar side

Underneath the dial sits a solar cell that converts any light into electrical energy, which is stored in a rechargeable secondary cell. Sunlight is the most efficient source, but indoor light also charges the watch. You never need to open the case for a routine battery swap the way you would with a standard quartz watch.

The GPS side

The Astron uses GPS signals in two different ways:

• Time adjustment: The watch connects to at least one GPS satellite and resets the time to the second. Current 3X and 5X calibers do this automatically once a day when they detect bright light, ideally sunlight, and you can also trigger it manually with a button press.
• Time zone adjustment: When you land somewhere new, you press a button and the watch acquires multiple satellites to work out its position, then switches to the correct local time zone. Because the 3X and 5X movements use independent motors for the hour, minute, and seconds hands, the change itself can take just a few seconds.

Every Astron at Lexor Miami also includes a perpetual calendar programmed through February 28, 2100, so you never have to adjust the date at the end of a short month or in a leap year. An in-flight mode switches off GPS reception for air travel, and a power reserve indicator shows how much energy is stored.

That combination is why travelers love the Astron. You can fly from Miami to Madrid, turn off airplane mode on your phone, press one button on your watch, and both devices show the right local time before you reach the gate.

Explore GPS Solar Astron Models

Does the Seiko Astron Have a Battery? How Long Does the Charge Last?

This is the single most common question we get about the Astron, so here is the clear answer.

The Seiko Astron does not use a disposable battery like a typical quartz watch. It uses a rechargeable cell that is charged by light. According to Seiko's official specifications for every current Astron caliber we carry (3X62 and 5X63), a fully charged watch runs for approximately six months without any additional light.

If the watch sits in complete darkness for 72 hours, for example in a drawer or a safe, it enters a power save mode. The hands stop moving and the watch stops trying to connect to GPS, which slashes energy consumption. In that sleeping state, the Astron keeps its internal time and calendar for up to about two years. When you take it out, expose it to light for a few seconds or press a button, and it wakes up and moves the hands back to the correct time on its own.

Practical tips for keeping your Astron charged:

• Wear it regularly with the dial uncovered. A long shirt cuff blocks light most of the day.
• If you rotate watches, leave the Astron near a window rather than in a dark drawer.
• Check the power reserve indicator from time to time. If it is low, place the watch in daylight for several hours.
• Avoid charging it right next to a hot lamp or on a car dashboard in the Florida sun, since excessive heat is not good for any watch.

Like any rechargeable cell, the internal storage cell can lose capacity over many years. If that happens, an authorized Seiko service center can replace it. That is very different from swapping a dead battery every couple of years.

Why Won't My Seiko Astron Sync? GPS Reception Explained

The second most common question comes from people who already own an Astron, or who read an owner's complaint online: "My Astron won't sync indoors." Here is why, and how to get reliable reception every time.

GPS signals come from satellites roughly 20,000 kilometers above the Earth. They are weak by the time they reach the ground, and they do not pass well through roofs, concrete, or metal. That is true for every GPS device, including your car's navigation when you drive into a parking garage. Reviewers who tested the Astron found that it connected reliably outdoors and failed mainly indoors or in obstructed areas, and reception on airplanes worked best near a window and sometimes took more than one attempt.

How to get a successful GPS sync

1. Go outside. Stand somewhere with an open view of the sky, away from tall buildings. A Miami balcony, a park, or an open parking lot all work well.
2. Face the dial up. Keep your wrist still with the dial pointing at the sky, since the antenna sits on the dial side of the watch.
3. Use the right function. A time adjustment needs only one satellite and is quick. A time zone adjustment needs several satellites and takes longer, so be patient.
4. Check the result display. Astron models show whether the last reception succeeded, so you can confirm the sync worked.
5. On a plane, turn on in-flight mode during the flight and do your time zone update after landing, ideally outside the terminal or next to a large window.

Exact button sequences differ slightly between the 3X62 and 5X63 calibers, so keep the instruction booklet included in the box. If you buy your Astron at our Miami showroom, our team will walk you through the sync process before you leave the store.

How Accurate Is the Seiko Astron?

When it syncs, the Astron shows the time as precisely as the atomic clocks on board the GPS satellites. Seiko describes that precision as one second in 100,000 years.

Between syncs, the watch relies on its own quartz movement. Seiko's official accuracy rating for the 3X62 and 5X63 calibers is ±15 seconds per month without GPS reception, at temperatures between 5°C and 35°C. Because the Astron automatically tries to resync every day when it sees bright light, that small drift is erased constantly in normal use. Even if you spend a few days without seeing the sun, the error remains measured in seconds.

For comparison, a typical mechanical watch, even an excellent one, can gain or lose several seconds per day. With an Astron, you will never need to set your watch again.

See Every Seiko Astron in Stock

Is the Seiko Astron Too Big? Sizing Guide for Every Wrist

The Astron's reputation for being big comes from the first-generation models of 2012 to 2014, which measured about 47mm across. The current Astron range is much more wearable. Here are the official dimensions of every Astron available at Lexor Miami:

Model	Caliber	Diameter	Thickness	Lug-to-Lug	Price
SSJ014	3X62	41.2mm	12.0mm	48.5mm	$2,300
SSJ023	3X62	42.0mm	12.0mm	47.9mm	$2,400
HAB001	5X63	43.4mm	12.4mm	50.0mm	$2,700
HAB002	5X63	43.4mm	12.4mm	50.0mm	$2,700
HAB005 (Limited)	5X63	43.4mm	12.4mm	50.0mm	$2,900
HAB006 (Limited)	5X63	43.4mm	12.4mm	50.0mm	$2,900

How to choose by wrist size:

• Smaller wrists (about 6 to 6.75 inches): Start with the SSJ014 or SSJ023. With lug-to-lug lengths under 49mm and a 12mm profile, they sit neatly on the wrist and slide under a dress shirt cuff.
• Medium wrists (about 6.75 to 7.25 inches): Any model works. The HAB chronographs give more wrist presence, while the SSJ models feel more understated.
• Larger wrists (7.25 inches and up): The 43.4mm HAB series, with its 50mm lug-to-lug, is the natural choice and offers the most complications.

Titanium is the Astron's secret weapon. It is noticeably lighter than stainless steel, so even the larger HAB models wear lighter than their dimensions suggest. Seiko lists the HAB006 at about 121g on its titanium bracelet and the SSJ023 at about 107g. Still, the best test is your own wrist. If you live in South Florida, from Doral to Fort Lauderdale, come try them on at our showroom on NW 20th Street, where we offer free parking.

Seiko Astron Calibers Explained: 3X62 vs. 5X63

The six Astron watches we carry use two different GPS Solar movements. Choosing between them is mostly about how many functions you want.

Caliber 3X62: the streamlined traveler

Found in the SSJ014 and SSJ023, the 3X62 focuses on the essentials: GPS time zone adjustment, automatic and manual time adjustment, a date display, a perpetual calendar, a power reserve indicator, in-flight mode, and automatic hand position alignment. It runs on 10 jewels and its compact construction allows a slimmer 41 to 42mm case. If you want a clean three-hand design with all the GPS magic, the 3X62 is the smart choice.

Caliber 5X63: the Dual-Time Chronograph

Found in the HAB001, HAB002, HAB005, and HAB006, the 5X63 is Seiko's newest GPS Solar Dual-Time Chronograph movement, introduced in 2026. It adds a 24-hour chronograph measuring in 1/20-second increments, a dual-time display that shows your home time while traveling, world time across 38 time zones, a day display, daylight saving time adjustment, and a time transfer function. Compared with the older 5X83 caliber, which had a 12-hour chronograph, the 5X63 doubles the chronograph range and allowed Seiko to arrange the sub-dials horizontally in a cleaner, symmetrical layout. The HAB series also features Seiko's Smart Switch quick-change system, so you can swap straps with the press of a button.

If you fly internationally several times a year, the dual-time display alone may be worth the step up to a 5X63 model. Seeing Miami time and local time at a glance makes calling home or scheduling meetings across time zones effortless.

Compare Astron Models Side by Side

The Seiko Astron Models at Lexor Miami: In-Depth Look

Seiko Astron SSJ014: Rose-Gold Accents, Everyday Elegance

The SSJ014 is the most affordable and most compact Astron in our lineup, and it might be the best entry point into the collection. Its 41.2mm titanium case features a polygonal bezel with a rose-gold-colored super-hard coating, a first for the Astron line, framing a dark gray dial with a pressed crystal pattern inspired by the quartz crystal of the original 1969 Astron. Rose-gold-toned applied indexes and LumiBrite hands keep it highly legible day and night.

Inside is the 3X62 GPS Solar caliber, with 100 meters of water resistance, a sapphire crystal with Seiko's super-clear coating, and a titanium bracelet with an easy-adjust three-fold clasp. At about 110g, it wears comfortably from the office to dinner in Wynwood. If you want a GPS watch that looks like a luxury dress-sport piece rather than a gadget, start here.

Best for: First-time Astron buyers, smaller wrists, and anyone who wants warm two-tone styling. Price at Lexor Miami: $2,300.

Seiko Astron SSJ023: The Deep-Blue Celestial Dial

The SSJ023 is the Astron for anyone who loves blue dials. Seiko designed its dial with a fine, sand-like texture that evokes the surface of a planet, colored in a deep blue inspired by the view of Earth from space. The hour and minute hands are partly skeletonized and paired with bold applied indexes for excellent legibility.

The 42mm case uses a futuristic two-layer bezel that combines titanium and aluminum, with the lower layer peeking through six notches in the upper one. The bracelet's beveled edges catch the light beautifully. Like the SSJ014, it runs on the 3X62 caliber, measures just 12mm thick, offers 100 meters of water resistance, and weighs about 107g. At $2,400, it matches Seiko's U.S. suggested retail price.

Best for: Travelers who want a versatile daily watch with a standout dial. Price at Lexor Miami: $2,400.

Shop the Seiko Astron Collection

Seiko Astron HAB001: Blue-Gray Dual-Time Chronograph

The HAB001 is one of the first watches to use Seiko's new 5X63 caliber, launched in 2026 alongside Seiko's 145th anniversary celebrations. Its blue-gray dial features a geometric pattern of interlocking triangles, and the new movement places the sub-dials horizontally across the dial for a balanced, symmetrical look that feels more refined than earlier Astron chronographs.

The 43.4mm super-hard coated titanium case is 12.4mm thick and pairs with a matching titanium bracelet and Seiko's Smart Switch system for quick strap changes. You get GPS time and time zone adjustment, dual time, a 24-hour chronograph, world time, a perpetual calendar, and 100 meters of water resistance. At $2,700, it matches Seiko's U.S. suggested retail price.

Best for: Frequent international travelers who want the full feature set in a versatile color. Price at Lexor Miami: $2,700.

Seiko Astron HAB002: Black Dial, Maximum Versatility

The HAB002 shares the HAB001's case, bracelet, and 5X63 movement, but swaps in a black patterned dial with contrasting sub-dials. Black is the most versatile dial color in watchmaking, and on the HAB002 it gives the Astron a sporty, technical look that works equally well with a suit or a polo.

Functionally, it is identical to the HAB001: GPS Solar time and time zone adjustment, dual time, a 24-hour chronograph, day display, perpetual calendar, LumiBrite lume, sapphire crystal, and 100 meters of water resistance. If you can only own one watch and you travel often, the HAB002 is a very strong candidate.

Best for: One-watch collectors who want a sporty, do-everything travel chronograph. Price at Lexor Miami: $2,700.

View Astron Dual-Time Chronographs

Seiko Astron HAB005: Crystal Green Limited Edition

The HAB005 is one of two 2026 limited editions built on the 5X63 caliber, and it is limited to 1,200 pieces worldwide. Its Crystal Green dial uses a new pressed pattern inspired by the sparkling facets of quartz crystal, set against black sub-dials and accents. It is bold, summery, and unlike anything Seiko has offered in the Astron line before.

Beyond the dial, it delivers everything the 5X63 offers, plus a serial-numbered "LIMITED EDITION" caseback, an extra black silicone strap you can attach in seconds with the Smart Switch system, and a special presentation box. For a deeper look at this reference, read our full Seiko Astron HAB005 Crystal Green review.

Best for: Collectors who want a numbered limited edition with a color that stands out. Price at Lexor Miami: $2,900.

Seiko Astron HAB006: Crystal Pink Limited Edition

The HAB006 is the HAB005's sibling, also limited to 1,200 pieces worldwide. Seiko drew its Crystal Pink dial color from rose quartz, and the faceted pressed pattern makes the dial shimmer as it moves with the light. The black sub-dials and black silicone strap included in the box create a striking contrast.

Specifications match the HAB005: 43.4mm super-hard coated titanium case, 12.4mm thick, 50mm lug-to-lug, sapphire crystal with super-clear coating, LumiBrite, 100 meters of water resistance, and the full 5X63 GPS Solar Dual-Time Chronograph movement. It is one of the most distinctive watches Seiko has released in years, and a confident statement piece for Miami's bright, colorful style.

Best for: Collectors and gift buyers looking for something truly unique and limited. Price at Lexor Miami: $2,900.

Shop Seiko Astron Limited Editions

Seiko Astron vs. Citizen Satellite Wave vs. Grand Seiko Quartz

Most shoppers comparing GPS and high-accuracy watches end up weighing these three options.

Seiko Astron vs. Citizen Satellite Wave GPS

Citizen's Satellite Wave GPS line is the Astron's main rival. Both use light-powered movements and satellite signals to set the time and time zone, so on paper they solve the same problem. The decision usually comes down to three factors:

• Design language: Modern Astron models follow an angular, integrated-bracelet luxury sports style with textured dials. Satellite Wave models tend to look more like technical pilot or sports instruments. Choose the one you would rather look at every day.
• Size range: The current Astron lineup offers 41 to 43mm options with 12 to 12.4mm thickness, which suits a wide range of wrists.
• Dealer support: Buying from an authorized dealer protects your manufacturer's warranty, whichever brand you choose.

Owners on watch forums are split on the comparison. Some prefer Citizen's technology, while others feel the Astron's finishing and perceived quality on the wrist are superior. The best approach is to try both on. You can browse our Citizen watches alongside the Astron collection at our showroom.

Seiko Astron vs. Grand Seiko Quartz

Grand Seiko's 9F quartz movements are among the most accurate standalone quartz calibers in the world, with exceptional hand finishing and a higher price point. However, they do not receive GPS signals and do not change time zones automatically. If your priority is hand-finished craftsmanship and you rarely travel, Grand Seiko quartz is wonderful. If you want a watch that always shows the correct local time anywhere on Earth without ever setting it, the Astron does something a Grand Seiko quartz cannot.

Seiko Astron vs. a smartwatch

Many of our customers come to the Astron after years of wearing a smartwatch. The Astron offers the same "always right" time with none of the downsides: no nightly charging, no notifications, no software updates, and a titanium case and sapphire crystal designed to last for decades. It is a smart watch in the original sense of the word.

Is the Seiko Astron a Luxury Watch? Does It Hold Its Value?

Yes, the Seiko Astron is a luxury watch. It sits in Seiko's premium Seiko Luxe tier, uses titanium cases with Seiko's super-hard coating, sapphire crystals with super-clear coating, in-house GPS Solar calibers, and finishing well above Seiko's mainstream lines. Watch reviewers have consistently described it as a high-end quartz watch rather than a gadget priced for its technology.

Resale value deserves an honest answer. Like most Seiko models, a standard Astron is not an investment piece the way certain Rolex references are, and pre-owned Astron watches typically sell below retail. Numbered limited editions such as the HAB005 and HAB006 tend to hold value better than regular production models, but you should buy an Astron to wear and enjoy, not to flip.

You may see pre-owned Astron watches listed online for less than retail. Before going that route, consider what you give up:

• Manufacturer's warranty: A watch bought new from an authorized dealer comes with Seiko's full factory warranty. Gray-market and private sales may not.
• Authenticity and condition: Buying new from an authorized Seiko Luxe dealer guarantees a genuine, never-worn watch with original box and papers.
• Battery health: A used Astron's rechargeable cell has an unknown history. A new one starts fresh.
• Returns: Lexor Miami offers a 30-day return policy with a prepaid return label. Private sellers rarely do.

Seiko Astron Pros and Cons

Pros

• Always shows the correct local time anywhere in the world via GPS
• Light-powered, with about six months of runtime on a full charge and up to two years in power save mode
• Lightweight titanium cases with super-hard coating and sapphire crystals
• Perpetual calendar through February 28, 2100
• Modern 41 to 43mm sizes with 12 to 12.4mm thickness, much more wearable than early models
• Dual-time chronograph and world time on the new 5X63 HAB models
• Distinctive, angular luxury sports design with textured dials

Cons

• GPS reception requires an open view of the sky and usually fails indoors
• Quartz movement, so it will not appeal to collectors who only want mechanical watches
• Resale value is moderate, like most non-limited Seiko models
• Learning the button functions takes a little time at first
• The HAB chronographs may feel large on very small wrists

Why Buy Your Seiko Astron at Lexor Miami?

Lexor Miami has served luxury watch, sunglasses, and fragrance shoppers for more than 20 years, and we are an authorized Seiko Luxe dealer. When you buy your Astron from us, you get:

• 100% authentic, brand-new watches sourced through Seiko's authorized distribution, with original box and papers
• Full manufacturer's warranty
• Free shipping on orders over $150 within the 48 contiguous U.S. states
• 30-day returns with a prepaid return label
• A real Miami showroom at 2371 NW 20th St, Miami, FL 33142, with on-site security and free parking, open Monday to Saturday, 10 AM to 6 PM
• Expert help by phone at +1 305-633-0950 or on WhatsApp at +1 786-515-7669
• More than 3,100 five-star Google reviews from customers across Miami-Dade, Broward, and the rest of the country

Whether you are shopping for a Father's Day gift, a graduation present, a retirement watch, or simply a reward for yourself, our team can help you choose the right Astron and set it up before you leave the store.

Shop Seiko Astron Watches at Lexor Miami

Which Seiko Astron Should You Buy?

After helping many customers in our Miami showroom choose their first Astron, here is the simplest way we can sum it up:

• Want the best value and a compact fit? Choose the SSJ014.
• Love blue dials and want an everyday travel watch? Choose the SSJ023.
• Fly internationally and want dual time plus a chronograph? Choose the HAB001 or HAB002.
• Want a numbered limited edition that stands out? Choose the HAB005 or HAB006.

Every one of these watches shares the same core promise: the correct time, anywhere in the world, powered by light, in a titanium case built to last. The Seiko Astron is the rare luxury watch that is genuinely more useful than the ones it competes with, and it is backed by more than five decades of Seiko quartz innovation going back to the very first Astron in 1969.

If you are still deciding, call or message our team, or visit us in Miami to try them on. We will help you compare sizes, test the GPS sync outdoors, and find the Astron that fits your wrist and your travel style.

Find Your Seiko Astron Today

Final Thoughts: The Seiko Astron Is the Travel Watch That Thinks for You

The Seiko Astron answers the questions most buyers worry about. It does not need routine battery changes, it stays accurate to the second whenever it sees the sky, and today's models wear far more comfortably than the early generations. Its only real limitation, GPS reception indoors, is shared by every satellite-controlled device and is easy to manage once you know how. For travelers, tech lovers, and anyone tired of setting their watch, it is one of the most practical luxury watches you can buy in 2026.

Here is a quick recap of the Seiko Astron models available now at Lexor Miami:

• Seiko Astron GPS Solar SSJ014: 41.2mm, rose-gold-colored bezel, Caliber 3X62, $2,300
• Seiko Astron GPS Solar SSJ023: 42mm, deep blue celestial dial, Caliber 3X62, $2,400
• Seiko Astron GPS Solar Dual-Time Chronograph HAB001: 43.4mm, blue-gray dial, Caliber 5X63, $2,700
• Seiko Astron GPS Solar Dual-Time Chronograph HAB002: 43.4mm, black dial, Caliber 5X63, $2,700
• Seiko Astron HAB005 Limited Edition: Crystal Green, 1,200 pieces, Caliber 5X63, $2,900
• Seiko Astron HAB006 Limited Edition: Crystal Pink, 1,200 pieces, Caliber 5X63, $2,900

Looking for something mechanical instead? Browse the full Seiko Luxe collection, the Seiko watches collection, or our limited edition watches.

Frequently Asked Questions About the Seiko Astron

Does the Seiko Astron need a battery replacement?

No routine battery changes are needed. The Seiko Astron is powered by light and stores energy in a rechargeable cell. A full charge runs the watch for about six months, and after 72 hours without light it enters power save mode, keeping the time for up to about two years. Over many years the rechargeable cell may lose capacity, and an authorized Seiko service center can replace it.

Does the Seiko Astron work indoors?

The watch keeps running indoors and charges from indoor light, but GPS reception usually requires an open view of the sky. For a time sync or a time zone change, step outside with the dial facing up. Between syncs, the Astron's quartz movement stays accurate to about ±15 seconds per month.

Is the Seiko Astron worth the money?

For travelers and anyone who values precision and convenience, yes. You get satellite-controlled accuracy, automatic time zone adjustment, solar power, a perpetual calendar through 2100, a titanium case, and a sapphire crystal. At Lexor Miami, current Astron models cost $2,300 to $2,900 and include the full manufacturer's warranty.

What is the difference between the Seiko Astron SSJ and HAB models?

The SSJ014 and SSJ023 use the Caliber 3X62, a streamlined GPS Solar movement in a slimmer 41.2 to 42mm case. The HAB001, HAB002, HAB005, and HAB006 use the Caliber 5X63 Dual-Time Chronograph movement, which adds dual time, world time, a day display, and a 24-hour chronograph in a 43.4mm case.

Is the Seiko Astron good for small wrists?

Yes, if you choose the right model. The SSJ014 measures 41.2mm with a 48.5mm lug-to-lug, and the SSJ023 measures 42mm with a 47.9mm lug-to-lug, both just 12mm thick. Their lightweight titanium construction makes them comfortable on smaller wrists. The 43.4mm HAB chronographs suit medium to larger wrists.

Where can I buy an authentic Seiko Astron in Miami?

Lexor Miami is an authorized Seiko Luxe dealer located at 2371 NW 20th St, Miami, FL 33142. Every Astron is brand new, 100% authentic, and backed by the manufacturer's warranty. You can shop online at lexormiami.com with free U.S. shipping on orders over $150, or visit our showroom Monday to Saturday from 10 AM to 6 PM.

Related Reading from Lexor Miami

• Seiko Astron HAB005: The Crystal-Green GPS Solar Limited Edition
• Seiko Prospex SPB483: A Diver's GMT Watch Built for Travel
• Seiko Luxe SSC927 Speedtimer Solar Chronograph
• The Ultimate Seiko Prospex Alpinist, Diver & GMT Buying Guide
• Seiko Prospex Marinemaster 1965 SJE099
• Shop the Latest Seiko Watches Online and In-Store at Lexor Miami