All Seiko lines › Prospex › Sea
Seiko Prospex Sea diver's, 41.3 mm (6R55)
4 versions of this watch are on Seiko's own sites right now, across 32 regions. Last checked Nov 13, 2026.
Estimated US price: About $1,100 from Seiko's US list price and its list prices in other countries, converted.
Retailers ask: $1,100 to $1,384 across 3 listings at 2 sellers, checked Nov 13, 2026. See the sellers
Photos are Seiko's own, shown from Seiko's sites. Click a photo to jump to that version.
- Calibre
- 6R55
- Case diameter
- 41.3 mm
- Thickness
- 12.5 mm
- Lug to lug
- 48.2 mm
- Variants listed now
- 4
- Regions
- 32
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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 | SPB481 Also coded SPB481J1 | Not published | Not stated Clasp: Three-fold clasp with secure lock , push button release with extender 179 g | Stainless steel | Regular | 31 regions | 1,100 USD USA · Nov 13, 2026 | From 1,100.00 USD Teddy Baldassarre · 2 sellers checked | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (34 sites) and its list prices
Buying options (2)Offers seen available at the last check come first, then by item price. Shipping, taxes and import charges are not included. Commission never affects the order.
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 | SPB485 Also coded SPB485J1 | Not published | Not stated Clasp: Three-fold clasp with secure lock , push button release with extender | Stainless steel | Regular | 31 regions | 1,100 USD USA · Nov 13, 2026 | From 1,250.00 EUR Seiko Boutique Ireland · 1 seller checked | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (35 sites) and its list prices
Buying options (1)Offers seen available at the last check come first, then by item price. Shipping, taxes and import charges are not included. Commission never affects the order.
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 | SPB483 Also coded SPB483J1 | Not published | Not stated Clasp: Three-fold clasp with secure lock , push button release with extender 179 g | Stainless steel | Regular | 30 regions | 1,100 USD USA · Nov 13, 2026 | No seller matched yet | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (33 sites) and its list prices
Buying options (0)No seller offer has been matched to this exact variant yet. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SPB485JC | Not published | Not stated | Stainless steel Translated from Seiko's regional page | セイコーオンラインストア専用モデル | 1 region Japan | 176,000 JPY Japan · Nov 13, 2026 about $1,100 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
Asking prices for new watches at the last check. Each was in stock at that check, but stock moves, and shipping, tax and import charges are not included. Each reference links to the seller's page.
| Seller | Version | Asking price | Checked |
|---|---|---|---|
| Seiko Boutique Ireland | SPB481 | 1,250.00 EUR about $1,384 | Nov 13, 2026 |
| Seiko Boutique Ireland | SPB485 | 1,250.00 EUR about $1,384 | Nov 13, 2026 |
| Teddy Baldassarre | SPB481 | 1,100.00 USD | Nov 13, 2026 |
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 | Seiko product page |
| Power reserve / battery | Approx. 72 hours(3 days) | Seiko product page |
| Water resistance | 300m / 1000ft diver's | Seiko product page |
| Crystal | Sapphire crystal | Seiko product page |
| Lug width | 20 mm | Seiko product page |
| Seiko case codes | 6R55-00J0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 6R55 and either the same Seiko case code or the same case size. 7 reference codes lead to this page.
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