All Seiko lines › Astron › Other Astron
Seiko Astron, 45.5 mm (8X42)
3 versions of this watch are on Seiko's own sites right now, across 3 regions. Last checked Nov 13, 2026.
Estimated US price: About $1,765 to $2,090, converted from Seiko's list prices in EUR, INR.
Retailers ask: no retailer listing matched yet.
Photos are Seiko's own, shown from Seiko's sites. Click a photo to jump to that version.
- Calibre
- 8X42
- Case diameter
- 45.5 mm
- Thickness
- 13 mm
- Lug to lug
- 54.6 mm
- Variants listed now
- 3
- Regions
- 3
Listed means the watch was on an official Seiko regional site or store at the last check. It does not mean it is in stock, and it does not tell us whether Seiko is still making it.
Versions listed now
Same case and movement in every row. What changes is the colour, the strap or bracelet, the finish and where Seiko sells it. Seiko's spec sheets don't state dial colour, so a colour appears only where Seiko's US store tags one.
| Photo | Reference | Colour | Strap / bracelet | Case | Edition | Listed in | Seiko list price | Buy |
|---|---|---|---|---|---|---|---|---|
 | SSE149 Also coded SSE149J1 | Not published | Not stated Clasp: Three-fold clasp with push button release | Stainless steel (super hard coating) with ceramic bezel | Regular | 2 regions India, Philippines | 170,000 INR India · Nov 13, 2026 about $1,805 in US dollars | No seller matched yet |
Where Seiko lists it (2 sites) and its list pricesBuying options (0)No seller offer has been matched to this exact variant yet. | ||||||||
 | SSE151 Also coded SSE151J1 | Not published | Not stated Clasp: Three-fold clasp with push button release | Stainless steel (super hard coating) with ceramic bezel | Regular | 2 regions India, Portugal | 1,800 EUR Portugal · Nov 13, 2026 about $1,765 in US dollars | No seller matched yet |
Where Seiko lists it (2 sites) and its list pricesBuying options (0)No seller offer has been matched to this exact variant yet. | ||||||||
 | SSE153 Also coded SSE153J1 | Not published | Silicone | Stainless steel (super hard coating) with ceramic bezel | Regular | 2 regions India, Portugal | 1,900 EUR Portugal · Nov 13, 2026 about $2,090 in US dollars | No seller matched yet |
Where Seiko lists it (2 sites) and its list pricesBuying options (0)No seller offer has been matched to this exact variant yet. | ||||||||
Where to buy
No retailer listing has been matched to a version on this line yet.
Estimated US prices use Seiko's US list price where there is one. Otherwise they are the middle of Seiko's list prices in other countries, converted at rates dated Nov 12, 2026 from ExchangeRate-API (free open endpoint). Those list prices include each country's sales tax, so a converted figure usually runs higher than a US price would. Retailer prices are asking prices on the date shown, not sold prices, and leave out shipping, tax and import charges.
The build
| Movement | GPS solar | Seiko product page |
|---|---|---|
| Functions | Overcharge prevention function Power save function Perpetual calendar to the February 28, 2100 World time function (39 time zones) Dual-time function Power reserve indicator Time zone adjustment by receiving GPS signals from GPS satellites, automatic time adjustment function Satellite acquisition status display function Reception result display function DST (Daylight Saving Time) Function to prevent the GPS signal reception (in-flight mode) Automatic hand position alignment function Date display | Seiko product page |
| Power reserve / battery | Operating for approx. 6 months (when fully charged), power save: approx. 2 years | Seiko product page |
| Water resistance | 10 bar | Seiko product page |
| Crystal | Sapphire crystal | Seiko product page |
| Lug width | 22 mm | Seiko product page |
| Seiko case codes | 8X42-0AC0, 8X42-0AE0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 8X42 and either the same Seiko case code or the same case size. 6 reference codes lead to this page.
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