All Seiko lines › Prospex › Sea › Marinemaster
Seiko Prospex Marinemaster diver's, 42.6 mm (8L45)
6 versions of this watch are on Seiko's own sites right now, across 35 regions. Last checked Nov 13, 2026.
Estimated US price: About $3,165 to $3,900 from Seiko's US list price and its list prices in other countries, converted.
Retailers ask: $4,649 across 1 listing at 1 seller, 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
- 8L45
- Case diameter
- 42.6 mm
- Thickness
- 14.1 mm
- Lug to lug
- 49.3 mm
- Variants listed now
- 6
- Regions
- 35
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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 | HBF001 Also coded HBF001J1 | Not published | Not stated Clasp: Three-fold clasp＆push button release, solid & slide adjuster | Stainless steel (Bezel: Stainless steel with ceramic display) | Marinemaster 1968 Heritage Diver's WatchMarinemaster | Diver's Histórico de 1968 | 34 regions | 3,600 USD USA · Nov 13, 2026 | From 4,200.00 EUR Seiko Boutique Ireland · 1 seller checked | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (39 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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 | HBF002 Also coded HBF002J1 | Not published | Not stated Clasp: Three-fold clasp＆push button release, solid & slide adjuster | Stainless steel (Bezel: Stainless steel with ceramic display) | LimitáltMarinemaster 1968 Heritage JAMSTEC Limited EditionMarinemaster 1968 Heritage JAMSTEC Limitli Üretim ModeliMarinemaster | Edição Limitada JAMSTEC Diver's Histórico de 1968 | 32 regions | 3,900 USD USA · Nov 13, 2026 | No seller matched yet | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (37 sites) and its list prices
Buying options (0)No seller offer has been matched to this exact variant yet. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | HBF003 Also coded HBF003J1 | Not published | Not stated Clasp: Three-fold clasp＆push button release, solid & slide adjuster | Stainless steel (Bezel: Stainless steel with ceramic display) | HBF003J1 | Marinemaster 8L45 Edição Limitada Save the OceanLimitáltMarinemaster 1968 Heritage Save the Ocean Limited Edition | 32 regions | 3,600 USD USA · Nov 13, 2026 | No seller matched yet | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (37 sites) and its list prices
Buying options (0)No seller offer has been matched to this exact variant yet. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | HBF001J | Not published | Not stated 210 g | Stainless steel (ceramic bezel insert) Translated from Seiko's regional page | マリンマスター 1968 ヘリテージ | 1 region Japan | 506,000 JPY Japan · Nov 13, 2026 about $3,165 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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | HBF002J | Not published | Not stated 210 g | Stainless steel (ceramic bezel insert) Translated from Seiko's regional page | マリンマスター 1968 ヘリテージ JAMSTEC コラボレーション限定モデル | 1 region Japan | 550,000 JPY Japan · Nov 13, 2026 about $3,440 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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | HBF003J | Not published | Not stated 210 g | Stainless steel (ceramic bezel insert) Translated from Seiko's regional page | マリンマスター 1968 ヘリテージ Save the Ocean限定モデル | 1 region Japan | 506,000 JPY Japan · Nov 13, 2026 about $3,165 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 | HBF001 | 4,200.00 EUR about $4,649 | 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 | 28,800 vibrations per hour (8 beats per second) Stop second hand function Date display | Seiko product page |
| Power reserve / battery | Approx. 72 hours(3 days) | Seiko product page |
| Water resistance | 300m / 1000ft diver's | Seiko product page |
| Crystal | Dual-curved sapphire crystal | Seiko product page |
| Lug width | 20 mm | Seiko product page |
| Seiko case codes | 8L45-00G0, 8L45-00H0, 8L45-00L0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 8L45 and either the same Seiko case code or the same case size. 9 reference codes lead to this page.
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