A 2026 limited model from Seiko Astron Nexstar with the theme of galaxies swirling in space.SBXC187has appeared.
As the latest in the "Starry Sky" series, the dark turquoise glitter dial floating in jet-black space and the all-black case and bracelet express a magnificent galaxy scene. The spiral pattern embossed from the center of the dial realistically conveys the energy of swirling stars.
Equipped with Cal.5X83 GPS satellite radio solar, a world time function that supports 38 time zones around the world, and a chronograph that measures 1/20 seconds, this is a watch that fully condenses the capabilities of the Astron Nexstar.
Limited to 1,500 pieces worldwide (500 pieces in Japan), serial number and LIMITED EDITION label written on the back cover. The jet black finish created by the titanium x super black diamond shield and the deep shine created by the mirror-finished bracelet make this watch far more superior in real life than in the still image.
A jet-black presence. Even if you look at them side by side, it becomes a picture.
The moment you put it on your arm, the universe expands.
SBXD039 — Another galaxy.
A dial with a swirling spiral pattern.
Precise layout of chronograph and world time.
Serial number and LIMITED EDITION stamped on the back cover.
SBXD039 — Another variation of the same series.
It's fun to compare the two models.
This is also a limited edition with a serial number.
■ Main features
- Limited to 1,500 pieces worldwide (500 pieces in Japan):"Starry Sky" 2026 limited model
- Spiral pattern dial:A newly developed pattern inspired by a swirling galaxy.
- Dark turquoise x lame dial:Expressing the scene of a galaxy floating in the jet-black universe
- Cal.5X83 GPS satellite radio solar:Automatic time correction with super smart sensor
- Super black diamond shield:Surface treatment boasts approximately 1.2 times the hardness of conventional products
- Adopts pure titanium:Lightweight, corrosion resistant, nickel allergy resistant
- World Time 38 Time Zones:Also equipped with dual time display function
- 1/20 second chronograph (12 hour total):Stopwatch function
- Perpetual calendar (until 2100):With day of the week display function
- Smart adjuster mechanism:Fine adjustment of the bracelet length is possible with the clasp
- Dual curve sapphire glass:Adopts super clear coating
- 10 ATM waterproof:Screw back specification
- Back cover serial number + LIMITED EDITION entry:Specifications that tickle collectors' hearts
■Specs
| brand | SEIKO |
|---|---|
| series | Astron NEXTER |
| Product number | SBXC187 |
| Limited number | Limited to 1,500 pieces worldwide (500 pieces in Japan) |
| Caliber No. | 5X83 |
| Drive method | GPS satellite radio solar (5X83) |
| precision | When not receiving: Average monthly difference ±15 seconds |
| Driving period | Approximately 6 months when fully charged / Approximately 2 years when power save |
| case material | Pure titanium (bezel: ceramics + aluminum) |
| case coating | super black diamond shield |
| band material | Titanium (C ring type) |
| glass | Dual curve sapphire glass (super clear coating) |
| Dial color | Blue glitter (dark turquoise x spiral pattern) |
| belt color | black |
| case size | Approximately 51×44×13.5mm |
| Belt width (maximum) | Approximately 25mm |
| weight | Approximately 105g |
| belt around arm | Maximum approximately 19.5cm |
| waterproof | Reinforced waterproof for daily life (10 atm) |
| Anti-magnetic | Yes |
| Other functions | Chronograph (1/20 second measurement/12 hour meter) / World time (38 time zones) / Dual time display / Perpetual calendar (until February 28, 2100) / Day of the week display / Power reserve display / Time transfer function / Super smart sensor (automatic time correction) ) / Forced time adjustment / Number of captured satellites display / Reception result display / DST (daylight saving time) function / Reception off (airplane mode) / Automatic needle position correction / Lumibrite (hands + index) / Smart adjuster mechanism / Overcharge prevention function / Power save function / Nickel allergy resistant / Screw back |
| Special notes | Back lid with serial number / LIMITED EDITION notation / Seiko Global Brand Core Shop exclusive model |
| accessories | Warranty card/dedicated box *As part of our efforts to address environmental issues, the instruction manual has been digitized. Please check the included warranty for details. |
| Release date | Released in January 2026 |
| list price | 330,000 yen (tax included) |
| Guarantee | 3 year warranty from manufacturer *Nanapure is currently running a 7-year warranty campaign. |
■ World view of spiral pattern dial
The theme of the "Starry Sky" series is the magnificent scenery of the universe itself. This time, SBXC187 has a newly developed spiral pattern stamping that spreads out from the center of the dial. The dial is engraved with images of young stars coming together to form galaxies.
The dark turquoise-based glitter dial changes its appearance depending on the angle and light source. The all-black case and bracelet represent the darkness of the universe, while the mirror-finish finish plays with the light of shining stars.The two-layered design is full of details that are hard to convey in photos.
■ Special finish called Super Black Diamond Shield
The super black diamond shield applied to the case and bracelet is a surface treatment technology that is approximately 1.2 times harder than Seiko's proprietary diamond shield. It is scratch resistant and retains its deep matte black texture for a long time.
By combining it with pure titanium material, the weight is kept to about 105g. The weight of this 44mm Nexstar case is amazing. The full black form may look assertive, but when you put it on your arm, it blends in surprisingly naturally.
■ Cal.5X83's ability to use GPS satellite radio waves
Caliber 5X83 is equipped with "GPS radio wave correction" that receives and corrects time information directly from GPS satellites, and automatic time correction function using a super smart sensor. If you are outdoors in an environment where GPS can be received, you will continue to keep accurate time no matter where you are in the world. It is also equipped with an airplane mode (reception off) function, and is designed to be used during flights.
World time supports 38 time zones, and the time transfer function allows you to quickly switch between home time and local time. The chronograph measures 1/20 seconds and has a 12-hour meter, and the perpetual calendar is automatically compatible until February 28, 2100. The design basically requires no effort as long as it can receive radio waves.
■ Rarity of only 500 pieces in Japan
Of the 1,500 pieces worldwide, only 500 will be distributed domestically. The serial number is engraved on the back cover, so you can check the number of the one you receive. The limited distribution of this model, which is exclusive to the Seiko Global Brand Core Shop, is another factor that further increases its rarity value.
As a collector, the correct model is to "get it while you can." This is a book that I highly recommend picking up as soon as it's released.
■ Available in SBXD039 and 2 models
"Starry Sky" 2026 limited model includes SBXD039 in addition to SBXC187. Brother models based on the same world view and spiral pattern dial, but with different coloring and material specifications. It's fun to compare the two side by side to decide which one to choose.
■ Recommended for these people
- Those who like space/celestial-themed designs
- Those who were looking for a limited model of Astron Nexstar
- People who want "absolutely accurate time" with a GPS satellite radio clock
- Those who are attracted to the all-black form
- People who want to use the world time function on overseas business trips and trips
- Those who want to combine a chronograph and multiple functions into one watch
- Those who want a collector's watch with a serial number
- Those looking for an anniversary/special gift
■ Buyer's comment
When I heard the word "spiral pattern," I honestly thought, "Are you talking about design again?" (laughs) But when I saw the real thing, that impression was blown away. The sense of depth created by the dark turquoise and glitter cannot be conveyed in photos. The appearance of the dial changes dramatically depending on how the light hits it. The finish of the titanium x super black diamond shield has a real texture, and it weighs only 105g, so the moment I held it in my hand, I honestly thought, ``This is good.'' 500 in Japan, if you want to move, hurry up.
■ Purchase at each mall
■ Related models (Seiko Astron)
■ Consult on LINE
