All Seiko lines › Prospex › Sea
“Willard”
Seiko Prospex Sea diver's, 42.7 mm, 13.2 mm thick, case 00T0/01G0 (6R35)
Collector nickname. Where the name comes from
9 versions of this watch are on Seiko's own sites right now, across 14 regions. Last checked Nov 13, 2026.
Estimated US price: About $1,065 to $1,730 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
- 6R35
- Case diameter
- 42.7 mm
- Thickness
- 13.2 mm
- Lug to lug
- 46.6 mm
- Variants listed now
- 9
- Regions
- 14
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 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPB183 Also coded SPB183J1 | Not published | Not stated 180 g | Stainless steel Translated from Seiko's regional page | Seiko Diver's Watch 55th Anniversary Limited EditionSeiko Diver’s Watch 55. Yıl Dönümü Limitli Üretim ModeliSeiko orologio subacqueo edizione limitata 55° anniversario | 6 regions | 1,450 EUR Italy · Nov 13, 2026 about $1,690 in US dollars | No seller matched yet | ||||||||
Where Seiko lists it (6 sites) and its list pricesBuying options (0)No seller offer has been matched to this exact variant yet. | ||||||||||||||||
 | SPB237 Also coded SPB237J1 | Not published | Polyester 106 g | Stainless steel | 1970 Heritage Diver's Watch | 5 regions | 1,300 USD USA · Nov 13, 2026 | 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. | ||||||||||||||||
 | SPB288 Also coded SPB288J1 | Not published | Not stated Clasp: Three-fold clasp with secure lock , push button release with extender | Stainless steel (super hard coating) | 1970 Heritage Diver's Watch Seiko Boutique exclusive model | 5 regions | 2,050 AUD Australia · Nov 13, 2026 about $1,395 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. | ||||||||||||||||
 | SPB153 Also coded SPB153J1 | Not published | Silicone 111 g | Stainless steel | 1970 Heritage Diver's Watch | 3 regions Australia, Hungary, UK | 1,050 GBP UK · Nov 13, 2026 about $1,270 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. | ||||||||||||||||
 | SPB151 Also coded SPB151J1 | Not published | Not stated Clasp: Three-fold clasp with secure lock , push button release with extender 180 g | Stainless steel | 1970 Heritage Diver's Watch | 2 regions Australia, USA | 1,300 USD USA · Nov 13, 2026 | 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. | ||||||||||||||||
| SPB261J1 | Not published | Nemesacél óraszíj szuperkemény bevonattal Seiko's regional wording | Nemesacél óratok Seiko's regional wording | Regular | 1 region Hungary | 570,000 HUF Hungary · Nov 13, 2026 about $1,730 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. | ||||||||||||||||
| SPB263J1 | Not published | Nemesacél óraszíj szuperkemény bevonattal Seiko's regional wording | Nemesacél óratok Seiko's regional wording | Regular | 1 region Hungary | 570,000 HUF Hungary · Nov 13, 2026 about $1,730 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. | ||||||||||||||||
| SPB265J1 | Not published | Nemesacél óraszíj szuperkemény bevonattal Seiko's regional wording | Nemesacél óratok Seiko's regional wording | Regular | 1 region Hungary | 570,000 HUF Hungary · Nov 13, 2026 about $1,730 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. | ||||||||||||||||
 | SPB288JC | Not published | Not stated | Stainless steel Translated from Seiko's regional page | ダイバーズ 1970 ヘリテージ セイコーブティック限定モデル | 1 region Japan | 170,500 JPY Japan · Nov 13, 2026 about $1,065 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 Date display | Seiko product page |
| Power reserve / battery | Approx. 70 hours | Seiko product page |
| Water resistance | 200m / 660ft diver's | Seiko product page |
| Crystal | Curved sapphire crystal | Seiko product page |
| Lug width | 20 mm | Seiko product page |
| Seiko case codes | 6R35-00T0, 6R35-01G0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 6R35 and either the same Seiko case code or the same case size. 14 reference codes lead to this page.
What people call it
A name is shown only where a source ties it to a reference on this page. Collector nicknames are not Seiko's names unless the row says so.
| “Willard” | Collector nickname. Source names SPB151, SPB153. “And today, the ‘Captain Willard’ could be yours, with the new SPB151 and SPB153.” | Monochrome Watches read 2026-11-12 |
|---|
Related lines
- “Willard” · Seiko Prospex Sea diver's, 42.7 mm, 13.2 mm thick, case 01W0 (6R35)
Same calibre and diameter, different published case - “Willard” · Seiko Prospex Sea diver's, 42.7 mm, 13.2 mm thick, case 02A0 (6R35)
Same calibre and diameter, different published case
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