All Seiko lines › Astron › Other Astron
Seiko Astron, 45.4 mm (8X22)
2 versions of this watch are on Seiko's own sites right now, across 3 regions. Last checked Nov 13, 2026.
Estimated US price: About $1,770 to $1,845, converted from Seiko's list prices in EUR, THB.
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
- 8X22
- Case diameter
- 45.4 mm
- Thickness
- 12.4 mm
- Lug to lug
- 55.2 mm
- Variants listed now
- 2
- 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 |
|---|---|---|---|---|---|---|---|---|
 | SSE161 Also coded SSE161J1 | Not published | Not stated | Acero inoxidable (revestimiento súper endurecido) con bisel de cerámica Seiko's regional wording | Regular | 3 regions Portugal, Spain, Thailand | 1,600 EUR Portugal · Nov 13, 2026 about $1,770 in US dollars | No seller matched yet |
Where Seiko lists it (3 sites) and its list pricesBuying options (0)No seller offer has been matched to this exact variant yet. | ||||||||
 | SSE159 Also coded SSE159J1 | Not published | Not stated | Aço inoxidável (revestimento super-rígido) com bisel em cerâmica Seiko's regional wording | Regular | 2 regions Portugal, Thailand | 1,600 EUR Portugal · Nov 13, 2026 about $1,845 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 | Prevenção de sobrecarga Poupança de Energia Calendário perpétuo programado até 28 de Fevereiro de 2100 Horário mundial (40 fusos horários) Indicador de reserva de marcha Ajuste de fuso horário através da recepção de sinais de satélites GPS, ajuste automático de hora Exibição do estado de detecção de satélites GPS Exibição do resultado de recepção Horas de Verão (DST, Daylight Saving Time) Bloqueio de recepção de sinais GPS (modo de vôo) Alinhamento automático da posição dos ponteiros Indicador de data | Seiko product page |
| Power reserve / battery | Autonomia de cerca de 6 meses (quando totalmente carregado); c. 2 anos em modo Poupança de Energia Some variants are published as: Aprox. 6 meses (cuando está completamente cargado), ahorro de energía: aprox. 2 años | Seiko product page |
| Water resistance | 10 bar Some variants are published as: 10 bares | Seiko product page |
| Crystal | Safira Some variants are published as: Cristal de zafiro | Seiko product page |
| Lug width | 22 mm | Seiko product page |
| Seiko case codes | 8X22-0AL0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 8X22 and either the same Seiko case code or the same case size. 4 reference codes lead to this page.
Holden's Watch Desk is an independent catalog. It is not affiliated with, sponsored by or endorsed by Seiko. Seiko and its model names are trademarks of their owners, and the product photos are Seiko's, shown from Seiko's own sites to identify each watch. To report a mistake or ask for something to be removed, email holden@holdenswatchdesk.com.