All Seiko lines › Seiko 5 Sports › Field series
Seiko 5 Sports Field series, 39.4 mm, 11.6 mm thick (4R36)
2 versions of this watch are on Seiko's own sites right now, across 30 regions. Last checked Nov 13, 2026.
Estimated US price: About $350 to $400 from Seiko's US list price and its list prices in other countries, converted.
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
- 4R36
- Case diameter
- 39.4 mm
- Thickness
- 11.6 mm
- Lug to lug
- 48.1 mm
- Variants listed now
- 2
- Regions
- 30
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 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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 | SRPM09 Also coded SRPM09K1 | Not published | Not stated Clasp: Three-fold clasp with push button release 146 g | Stainless steel | Edição Limitada HUFHUF Limited EditionHUF Limitli Üretim ModeliLimitált | 29 regions | 400 USD USA · Nov 13, 2026 | No seller matched yet | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (34 sites) and its list prices
Buying options (0)No seller offer has been matched to this exact variant yet. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SBSA323 | Not published | Not stated 146 g | Stainless steel; case back: stainless steel and glass Translated from Seiko's regional page | HUF コラボレーション限定モデル | 1 region Japan | 56,100 JPY Japan · Nov 13, 2026 about $350 in US dollars | No seller matched yet | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (1 site) and its list prices
Buying 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 | Automatic with manual winding | Seiko product page |
|---|---|---|
| Functions | Stop second hand function Day/Date display | Seiko product page |
| Power reserve / battery | Approx. 41 hours | Seiko product page |
| Water resistance | 10 bar | Seiko product page |
| Crystal | Hardlex | Seiko product page |
| Lug width | 20 mm | Seiko product page |
| Seiko case codes | 4R36-18C0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 4R36 and either the same Seiko case code or the same case size. 3 reference codes lead to this page.
Related lines
- Seiko 5 Sports Field series, 39.4 mm, 13.2 mm thick (4R36)
Same calibre and diameter, different published case
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