Seiko Astron SSJ023 Review Miami

The Seiko Astron SSJ023J1 is a 42mm super-hard-coated titanium GPS Solar watch with a deep blue dial textured like a planet's surface and a futuristic two-layer bezel. Its Caliber 3X62 sets the time and time zone by satellite, runs about 6 months on a full charge (about 2 years in power-save mode) and keeps to ±15 seconds per month without a signal. It weighs just 107 grams and is available at Lexor Miami, an authorized Seiko dealer, for $2,400 with a 3-year manufacturer warranty, free shipping and free returns within the contiguous United States.

The Seiko Astron SSJ023J1: deep blue "planet" dial, two-layer bezel, titanium case and Caliber 3X62.

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Seiko Astron SSJ023 at a Glance

Everything essential about the Seiko SSJ023 in one place:

• Reference: SSJ023 (SSJ023J1), Seiko Astron GPS Solar
• Movement: Seiko Caliber 3X62 GPS Solar, 10 jewels
• Accuracy: ±15 seconds per month without GPS reception (at 5°C to 35°C)
• Power reserve: About 6 months on a full charge; about 2 years in power-save mode
• Functions: GPS time and time zone adjustment, perpetual calendar until February 28, 2100, date, power reserve indicator, in-flight mode, automatic hand alignment
• Case: 42.0mm titanium with super-hard coating, 12.0mm thick, 47.9mm lug-to-lug
• Bezel: Two-layer construction in two different metals, with six notches revealing the lower layer
• Dial: Deep blue with a fine, sand-like texture inspired by a planet seen from space
• Crystal: Sapphire with super-clear coating
• Weight: 107 grams
• Magnetic resistance: 4,800 A/m
• Water resistance: 100 meters (10 bar)
• Extras: Nickel-allergy friendly, screw-down caseback, easy-adjust clasp
• Price at Lexor Miami: $2,400 with free U.S. shipping

Introduction: A GPS Watch That Looks to the Stars

Most GPS watches are designed around the technology inside them. The Seiko Astron SSJ023 is designed around an idea: looking at Earth from space. Its deep blue dial carries a fine texture that resembles grains of sand, inspired by the surface of a planet. Around it, a futuristic two-layer bezel frames the dial like an orbit. It is a fitting design for a watch that takes its time directly from satellites circling the planet.

The SSJ023 belongs to the second generation of Seiko's redesigned Caliber 3X62 Astron collection, introduced in October 2024. Where the first 3X62 models focused on clean, architectural simplicity, this generation adds more personality: a new bezel construction, new skeletonized hands and dials with a celestial theme. The result keeps everything that made the modern Astron so wearable, including a slim 12mm titanium case and integrated bracelet, while giving it a more distinctive, collectible look.

For American buyers, the SSJ023 is an easy watch to live with. It never needs a battery, almost never needs adjusting, weighs just 107 grams and is nickel-allergy friendly. It is accurate enough for the most demanding schedules and elegant enough to wear with a suit. At $2,400, it delivers technology and finishing that few watches in its class can match.

In this guide, we cover the history of the Astron name, the SSJ023's complete specifications, its materials and design, how its GPS Solar technology works, how it compares with other Astron and Seiko models, and why buying from an authorized dealer matters. All specifications are cross-checked against Seiko's official SSJ023J1 product data.

The History of the Seiko Astron

The Astron name has marked two of the biggest turning points in modern watchmaking. Understanding that history helps explain why the SSJ023 is more than just another GPS watch.

1881 to 1969: From a Tokyo Shop to a Revolution

Seiko began in 1881, when Kintaro Hattori opened a watch and jewelry shop in Tokyo. Over the following decades, the company built a reputation for precision. Then, on Christmas Day 1969, Seiko launched the Quartz Astron, the world's first quartz wristwatch. By using a vibrating quartz crystal instead of a mechanical balance, it was far more accurate than any watch before it. Within a few years, quartz technology changed the way the world told time.

2012: The World's First GPS Solar Watch

More than four decades later, Seiko revived the Astron name for another first: the world's first GPS Solar watch. It received time signals from GPS satellites, identified the wearer's time zone and ran entirely on light. For travelers, it solved a problem that every watch had faced since the beginning: how to always know the exact local time, anywhere.

2012 to 2022: Making GPS Wearable

Early GPS Solar watches were impressive but often large and complex. Over the next decade, Seiko worked to make its calibers smaller, more efficient and faster to receive signals, adding dual time and chronograph functions along the way.

2023: The Redesigned Astron and Caliber 3X62

In 2023, Seiko introduced a redesigned Astron collection built around the compact Caliber 3X62. It featured a slimmer titanium case, an integrated bracelet and a clean dial with a single subdial. Models like the Astron SSJ014 showed that GPS Solar watches could be elegant everyday watches.

2024: The Celestial Generation

In October 2024, Seiko expanded the 3X62 collection with new models including the SSJ023, SSJ025 and SSJ026. They introduced a two-layer bezel made from two different metals, new hands with skeletonized centers and dials with a planetary texture. The SSJ023, with its deep blue dial, is the one that most directly captures the image of Earth from space.

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Key Features of the Seiko Astron SSJ023

• Caliber 3X62 GPS Solar, Seiko's compact GPS Solar movement.
• GPS time and time zone adjustment: sets the exact time and local time zone from satellite signals.
• Automatic and manual time reception, plus satellite acquisition status and reception result displays.
• ±15 seconds per month accuracy without GPS reception.
• Solar powered: no battery to replace.
• About 6 months of power reserve, up to about 2 years in power-save mode, with overcharge prevention.
• Perpetual calendar correct until February 28, 2100.
• Power reserve indicator on the subdial.
• In-flight mode and automatic hand position alignment.
• Two-layer bezel made from two different metals, with six notches revealing the lower layer.
• Deep blue planet-textured dial with large indexes and new skeletonized hands.
• Super-hard-coated titanium case, 42.0mm wide and 12.0mm thick.
• Beveled integrated bracelet with raised, light-catching edges.
• Easy-adjust three-fold clasp with push-button release.
• Sapphire crystal with super-clear coating.
• LumiBrite on hands and indexes.
• 4,800 A/m magnetic resistance.
• 100m water resistance and screw-down caseback.
• Nickel-allergy friendly.

Benefits: What the SSJ023 Does for You Every Day

It is always on time. The SSJ023 checks its time against GPS satellites, which carry atomic clocks. Between receptions, it stays within about 15 seconds per month. You can trust it for flights, meetings and dinner reservations.

It adapts when you travel. Land in a new city, step outside and the watch can set itself to the local time zone by GPS. No apps, no manual adjustment.

It never needs a battery. Any light keeps it charged. A full charge lasts about six months, and if you store it, power-save mode stretches the reserve to about two years.

It is comfortable from morning to night. At 107 grams with a 12.0mm profile, the SSJ023 is one of the lightest watches in its class. Titanium feels warm against the skin, and the watch is nickel-allergy friendly.

It resists everyday wear. The super-hard coating protects the titanium against scratches, sapphire protects the dial and 4,800 A/m magnetic resistance protects against magnets in phones, laptops and bag clasps.

No date corrections, ever. The perpetual calendar handles short months and leap years until 2100.

It starts conversations. The planet-inspired blue dial and two-layer bezel make the SSJ023 more distinctive than a typical GPS watch. People notice it.

Seiko Astron SSJ023 Specifications

Specification	Seiko Astron SSJ023
Brand / Collection	Seiko / Astron GPS Solar
Reference	SSJ023 (SSJ023J1)
Caliber	Seiko 3X62 GPS Solar
Jewels	10
Accuracy	±15 seconds per month without GPS reception (5°C to 35°C)
Power reserve	Approx. 6 months fully charged; approx. 2 years in power-save mode
GPS functions	Time zone adjustment; automatic and manual time adjustment; satellite acquisition status; reception result display
Calendar	Perpetual calendar until February 28, 2100; date display
Other functions	Power reserve indicator, power save, overcharge prevention, in-flight mode, automatic hand position alignment
Case material	Titanium with super-hard coating
Bezel	Two-layer, two different metals (including aluminum), six notches
Case diameter	42.0mm
Case thickness	12.0mm
Lug-to-lug	47.9mm
Distance between lugs	14mm (integrated bracelet)
Weight	107g
Crystal	Sapphire with super-clear coating
Dial	Deep blue, fine sand-like planetary texture
Hands	New design with skeletonized centers
Luminous	LumiBrite on hands and indexes
Caseback	Screw-down
Bracelet	Integrated, beveled design
Clasp	Easy-adjust three-fold clasp with push-button release
Magnetic resistance	4,800 A/m
Water resistance	100m / 10 bar
Allergy	Nickel-allergy friendly
Launch	October 2024, regular production
Warranty at Lexor Miami	3 years
Price at Lexor Miami	$2,400

Materials and Build Quality

Super-Hard-Coated Titanium

The SSJ023's case is titanium, a metal about 40% lighter than stainless steel, strong, corrosion-resistant and naturally hypoallergenic. Untreated titanium scratches more easily than steel, so Seiko applies its super-hard coating to make the surface far more resistant to daily wear. The result is a watch that feels almost weightless but keeps its finish for years.

The Two-Layer Bezel

The bezel is the SSJ023's signature. It is built in two layers using two different metals, including aluminum. The upper layer has six notches cut into it, revealing the lower layer beneath. That construction creates depth, contrast and a futuristic, almost mechanical look, and it makes the watch instantly recognizable as part of the newest Astron generation.

Beveled Integrated Bracelet

The bracelet flows directly from the case. Its links have beveled, raised edges that catch the light, giving the bracelet a polished sparkle while keeping it comfortable. The integrated design gives the SSJ023 a seamless, modern silhouette.

Easy-Adjust Clasp

The three-fold clasp has a push-button release and an easy-adjust function, so you can fine-tune the fit without tools. In Miami heat, or after a long flight, that small adjustment makes a big difference in comfort.

Sapphire, Screw-Down Caseback and 100m Water Resistance

Sapphire crystal with a super-clear coating protects the dial and reduces reflections. A screw-down caseback contributes to 100 meters of water resistance, so the SSJ023 handles rain, hand washing, swimming and pool days. It is not designed as a professional dive watch.

Design: A Planet on Your Wrist

The deep blue dial's fine texture is inspired by a planet seen from space.

The Deep Blue Planetary Dial

Seiko designed the SSJ023's dial to evoke a planet viewed from space. Its fine, sand-like texture gives the deep blue surface a subtle grain that catches light from different angles. In bright sun, the blue looks vivid; indoors, it deepens toward navy. It is a dial that changes with its surroundings, much like a planet changes with the light of its sun.

New Skeletonized Hands and Bold Indexes

This generation of Astron introduced newly shaped hour and minute hands with skeletonized centers. They look lighter and more technical, and they let you see more of the dial texture. Large, bold indexes keep the time easy to read at a glance, and LumiBrite on both keeps the watch legible in the dark.

A Clean, Functional Layout

Like the rest of the 3X62 collection, the SSJ023 keeps its dial uncluttered. The date sits at 3 o'clock, and a small subdial near 8 o'clock shows information such as GPS reception status and power reserve. Everything you need is there; nothing you do not need is in the way.

Wearability

At 42.0mm wide, 12.0mm thick and 47.9mm lug-to-lug, the SSJ023 wears comfortably on medium to larger wrists. Its relatively short lug-to-lug for a 42mm watch, combined with its light weight, makes it feel smaller than its diameter suggests. If you are unsure about sizing, visit our Miami showroom or compare the 47.9mm length with a watch you already own.

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Technology: Inside Seiko Caliber 3X62 GPS Solar

How GPS Timekeeping Works

GPS satellites carry extremely accurate atomic clocks. When the SSJ023 receives their signal, it sets itself to the exact time. In time zone mode, it also uses the satellite data to determine your location and switch to the correct local time.

Automatic Reception

You do not have to remember to sync. When conditions allow, the watch can attempt automatic time reception on its own, so it stays accurate with almost no effort. Manual reception is always available with a button press.

Solar Power, Power Save and Overcharge Prevention

A solar cell beneath the dial converts any light into energy. Daily light exposure keeps the SSJ023 charged; a full charge lasts about six months. When the watch is stored in the dark, power-save mode stops the hands to conserve energy, stretching the reserve to about two years. Overcharge prevention protects the system in strong light.

Precision Between Signals

Without GPS reception, Caliber 3X62 keeps to ±15 seconds per month at normal temperatures, quartz-level precision that is corrected every time the watch receives a signal.

Perpetual Calendar, Hand Alignment and In-Flight Mode

The perpetual calendar stays correct until February 28, 2100. Automatic hand position alignment keeps the hands correctly positioned even after knocks. In-flight mode turns off reception during flights; switch it off after landing and receive your new time zone.

Magnetic Resistance

With 4,800 A/m magnetic resistance, the SSJ023 is protected against the everyday magnetic fields of phones, tablets, laptops and magnetic clasps.

Who Should Buy the Seiko Astron SSJ023?

• Frequent travelers who want accurate local time anywhere without manual adjustment.
• Blue-dial lovers who want something more distinctive than a flat sunburst dial.
• Fans of integrated-bracelet watches who want that modern sports-luxury look with real technology inside.
• Busy professionals who want a watch that never needs a battery or a date correction.
• Anyone sensitive to weight or nickel, thanks to 107-gram titanium construction.
• Space and design enthusiasts who appreciate the planetary theme.
• Gift buyers looking for a meaningful present for a graduation, promotion, anniversary or retirement.

Who might want something else? If you prefer a warmer, two-tone look with a rose gold-tone bezel, the Astron SSJ014 is a great alternative. If you need a chronograph and dual time, consider the Speedtimer SSH169. If you want the soul of a mechanical movement, explore the King Seiko collection.

Why Buy the Seiko Astron SSJ023 at Lexor Miami?

• Authorized Seiko dealer: Lexor Miami is listed on Seiko's official dealer locator. No gray market.
• 100% authentic and brand new: Original Seiko packaging and documentation.
• 3-year manufacturer warranty backed by Seiko's authorized service network.
• Free shipping and free returns: Free shipping within the 48 contiguous United States on this watch, plus 30-day returns with a prepaid label (unused, original condition and packaging).
• Secure checkout: Visa, Mastercard, American Express, Discover, PayPal, Apple Pay, Google Pay and Shop Pay.
• Expert help: Questions about sizing or GPS setup? Reach us by chat, WhatsApp, phone (+1 786-333-1331) or email.
• Visit our Miami showroom: 2371 NW 20th St, Miami, FL 33142, Monday to Saturday, 10 AM to 6 PM, with free parking and on-site security.
• More than 20 years of experience and over 3,100 five-star Google reviews.
• Family-owned and women-owned: Personal service from people who love watches.

Learn more about Lexor Miami, read our store FAQs, or explore luxury shopping in Miami.

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Seiko Astron SSJ023 vs. Similar Models

Model	Caliber	Case	Dial / Bezel	Weight	Key strength	Price
SSJ023	3X62 GPS Solar	42.0mm titanium, 12.0mm thick	Deep blue planet texture / two-layer bezel	107g	Distinctive design, light, 4,800 A/m	$2,400
SSJ014	3X62 GPS Solar	41.2mm titanium, 12.0mm thick	Gray grid texture / rose gold-tone bezel	110g	Warm two-tone look	$2,300
SSH169	5X83 GPS Solar	42mm black-coated steel, 12.9mm thick	Black sunray / gold-tone accents	—	Chronograph, dual time, 1,000-piece limited edition	$2,400
HAB001	5X63 GPS Solar	43.4mm titanium	—	—	Dual time, bigger presence	$2,700

SSJ023 vs. SSJ014: Blue Planet or Rose Gold?

Both use Caliber 3X62, a super-hard-coated titanium case and an integrated bracelet, and both are 12.0mm thick. The SSJ014 (2023) is slightly smaller at 41.2mm, with a gray quartz-inspired grid dial and a warm rose gold-tone bezel. The SSJ023 (2024) is 42.0mm but shorter lug-to-lug (47.9mm vs. 48.5mm), a few grams lighter, adds 4,800 A/m magnetic resistance in its official specs and brings the new two-layer bezel, skeletonized hands and blue planetary dial. Choose the SSJ014 for warmth and a dressier look; choose the SSJ023 for a more modern, distinctive design. The difference is just $100.

SSJ023 vs. SSH169: Simplicity or Chronograph?

The Speedtimer SSH169 costs the same $2,400 but is a different kind of watch: a sporty black GPS Solar chronograph with dual time, limited to 1,000 pieces for Seiko's 100th anniversary. The SSJ023 is slimmer, lighter and cleaner. Choose the SSH169 for functions and collector value; choose the SSJ023 for everyday elegance and comfort.

SSJ023 vs. Astron HAB001

The HAB001 uses a 5X-series GPS Solar caliber with dual time in a larger 43.4mm titanium case. It offers more functions and more wrist presence. The SSJ023 is smaller, lighter, simpler and $300 less.

SSJ023 vs. Its 2024 Siblings

The SSJ023 launched alongside the SSJ025 and SSJ026, which share the same case, bezel concept and Caliber 3X62 with different dial and color treatments. The SSJ023's deep blue dial is the most vivid of the group and the most direct expression of the "Earth from space" theme.

Explore more in the Seiko Astron collection, the Seiko Luxe collection or the full Seiko collection.

Luxury Lifestyle: Wearing the SSJ023 in Miami and Beyond

At the office: A blue dial is one of the most versatile choices in menswear. The SSJ023 pairs naturally with navy, gray and charcoal suits, white or light blue shirts and brown or black shoes. Its slim 12mm case slides under a shirt cuff.

When you travel: Fly from Miami to New York, Los Angeles, Madrid or Tokyo, and let the SSJ023 find the local time. At 107 grams, it is comfortable on long flights, and the easy-adjust clasp handles any swelling at altitude.

On the weekend: White linen shirt, light chinos, suede loafers: the blue dial is made for South Florida weekends. Titanium stays comfortable in the heat, and 100m water resistance means a pool day is no problem.

On the water: An afternoon on Biscayne Bay or a weekend in the Keys? Titanium resists corrosion from salt air, and a quick rinse with fresh water afterward keeps the bracelet looking new.

At dinner: Under warm evening light, the dial's grainy texture and the bezel's two layers create depth and sparkle. It is refined enough for a special evening in Brickell, Coral Gables or Miami Beach.

As a gift: The SSJ023 is a thoughtful gift for someone who travels, loves technology or simply appreciates beautiful design. It is the kind of watch that will be worn every day.

Building a collection? Pair the SSJ023 with a Seiko Presage mechanical dress watch, explore our limited edition watches or see our new arrivals.

Setting Up and Caring for Your Seiko Astron SSJ023

Getting started is simple. When your SSJ023 arrives, place it in bright light until the power reserve indicator shows a good charge. Then take it outside under open sky, away from tall buildings, and start a time zone reception. The watch identifies your location and sets the local time. After that, regular light exposure and automatic reception keep it running and accurate.

• Give it light: Daily exposure keeps it charged. Avoid storing it in a dark drawer for months.
• Recharge carefully: Use bright light, but avoid very hot surfaces like a car dashboard in summer.
• Receive outdoors: GPS works best under open sky.
• Use in-flight mode when boarding a plane.
• Rinse after salt water or chlorine and dry with a soft cloth.
• Clean the bracelet with a soft brush and mild soapy water.
• Service through an authorized Seiko service center to keep the warranty valid.

Seiko Astron SSJ023 FAQs

What is the Seiko Astron SSJ023?

The SSJ023 is a Seiko Astron GPS Solar watch with a 42mm super-hard-coated titanium case, a deep blue planet-inspired dial, a two-layer bezel and Caliber 3X62.

What movement does the SSJ023 use?

It uses Seiko Caliber 3X62 GPS Solar, with GPS time and time zone adjustment, a perpetual calendar and about 6 months of power reserve.

How accurate is the Seiko Astron SSJ023?

It is rated at ±15 seconds per month without GPS reception and corrects itself whenever it receives a GPS signal.

Does the Seiko SSJ023 need a battery?

No. It is solar powered. A full charge lasts about 6 months, or about 2 years in power-save mode.

What size is the Seiko Astron SSJ023?

The case is 42.0mm in diameter, 12.0mm thick and 47.9mm lug-to-lug. The watch weighs 107 grams.

Is the SSJ023 made of titanium?

Yes. The case is titanium with Seiko's super-hard coating, the bezel combines two different metals, and the watch is nickel-allergy friendly.

What is special about the SSJ023 bezel?

It is built in two layers of different metals. Six notches in the upper layer reveal the lower layer, creating a futuristic, three-dimensional look.

What is the SSJ023 dial inspired by?

Its deep blue dial has a fine, sand-like texture inspired by the surface of a planet seen from space.

Is the Seiko SSJ023 a limited edition?

No. The SSJ023 is part of Seiko's regular Astron collection, launched in October 2024.

Is the Seiko Astron a King Seiko?

No. Astron and King Seiko are separate Seiko collections. Astron focuses on GPS Solar technology; King Seiko focuses on mechanical watchmaking.

Is the SSJ023 water resistant?

Yes, to 100 meters (10 bar), suitable for swimming. It is not a professional dive watch.

Does the SSJ023 have dual time or a chronograph?

No. It focuses on precise time, date and GPS time zone adjustment. For dual time and chronograph functions, see 5X-caliber models such as the Speedtimer SSH169.

How much is the Seiko Astron SSJ023?

The Seiko Astron SSJ023 is $2,400 at Lexor Miami, with free shipping in the contiguous United States and a 3-year manufacturer warranty.

Is Lexor Miami an authorized Seiko dealer?

Yes. Lexor Miami is an authorized Seiko dealer listed on Seiko's official dealer locator.

Ready to Own the Seiko Astron SSJ023?

The SSJ023 combines more than 50 years of Astron innovation with one of the most distinctive designs in Seiko's current lineup. Light, accurate and effortless, it is a watch you will reach for every day.

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Conclusion: Is the Seiko Astron SSJ023 Worth Buying?

The Seiko Astron SSJ023 is one of the most interesting GPS Solar watches you can buy at $2,400. It carries the legacy of the world's first quartz watch and the world's first GPS Solar watch into a slim, light titanium package with a design that stands out: a blue planet on the dial and a two-layer bezel that frames it like an orbit.

Compared with the SSJ014, it is more modern and distinctive for just $100 more. Compared with the SSH169, it is slimmer, lighter and more elegant. Compared with the HAB001, it is simpler, more compact and more affordable.

If you want a refined everyday watch that is always on time, never needs a battery and looks as good in a boardroom as on a boat, the SSJ023 is an easy recommendation. Buy it from an authorized dealer, enjoy the 3-year warranty and let the satellites keep the time.

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About this guide: Written and reviewed by the Lexor Miami watch team, authorized Seiko dealer in Miami, Florida, with more than 20 years of experience in luxury watches. Specifications verified against Seiko's official SSJ023J1 product data. Price and availability verified October 2026 and subject to change. Explore more guides on the Lexor Miami blog.