All Seiko lines › Astron › Other Astron
Seiko Astron, 42.7 mm, 13.5 mm thick (5X53)
1 version of this watch is on Seiko's own sites right now, across 5 regions. Last checked Nov 13, 2026.
Estimated US price: About $2,880, converted from Seiko's list prices in EUR, INR, TRY.
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
- 5X53
- Case diameter
- 42.7 mm
- Thickness
- 13.5 mm
- Lug to lug
- 50 mm
- Variants listed now
- 1
- Regions
- 5
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 |
|---|---|---|---|---|---|---|---|---|
 | SSH023 Also coded SSH023J1 | Not published | Not stated | Aço Inoxidável (revestimento rígido) com bisel em cerâmica Seiko's regional wording | Quartz Astron 50. Limitli Üretim ModeliQuartz Astron 50th Limited Edition | 5 regions | 2,600 EUR Portugal · Nov 13, 2026 about $2,880 in US dollars | No seller matched yet |
Where Seiko lists it (5 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 | Função de prevenção de sobrecarga Função de economia de energia Calendário perpétuo até 28 de fevereiro de 2100 Função de hora mundial (39 fuso horário) Função de fuso horário Visor de data Exibição de Reserva de marcha Função de transferência de tempo (Alterna entre o mostrador principal e o sub-mostrador) Função de recepção de sinal GPS (ajuste do fuso horário, ajuste automático da hora, ajuste manual da hora) Função de exibição de status de captação de satélite Função de exibição dos resultados da recepção DST (Horário de Verão) Função para bloquear a recepção do sinal GPS (modo avião) Função de alinhamento automático da posição dos ponteiros | Seiko product page |
| Power reserve / battery | Funciona por aprox. 6 meses (quando totalmente carregado), economia de energia: aprox. 2 anos | Seiko product page |
| Water resistance | 10 ATM | Seiko product page |
| Crystal | Cristal de safira de dupla curvatura | Seiko product page |
| Lug width | 21 mm | Seiko product page |
| Seiko case codes | 5X53-0AK0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 5X53 and either the same Seiko case code or the same case size. 2 reference codes lead to this page.
Related lines
- Seiko Astron, 42.7 mm, 13.3 mm thick (5X53)
Same calibre and diameter, different published case - Seiko Astron, 42.7 mm, 12.2 mm thick (5X53)
Same calibre and diameter, different published case
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.