All Seiko lines › Prospex › Sea
“Willard”
Seiko Prospex Sea diver's, 42.7 mm, 13.2 mm thick, case 02A0 (6R35)
Collector nickname. Where the name comes from
1 version of this watch is on Seiko's own sites right now, across 8 regions. Last checked Nov 13, 2026.
Estimated US price: $1,350 Seiko US list price.
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
- 46.4 mm
- Variants listed now
- 1
- Regions
- 8
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 | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPB301 Also coded SPB301J1 | Not published | Not stated Clasp: Three-fold clasp with secure lock , push button release with extender 180 g | Stainless steel | 1970 Diver's Modern Re-interpretation Save the Ocean Special Edition1970 Diver's Modern Yeniden Üretim Save the Ocean Özel Modeli1970 Heritage Diver's Save the Ocean Special Edition | 8 regions | 1,350 USD USA · Nov 13, 2026 | No seller matched yet | ||||||||||||||||||||||||||||||||||||
Where Seiko lists it (8 sites) 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 | 6R35-02A0 | 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. 2 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 SPB301. “Last, but certainly not least, the 1970 Diver’s Modern Re-interpretation SPB301 uses the famous “Willard” case.” | Fratello read 2026-11-12 |
|---|
Related lines
- “Willard” · Seiko Prospex Sea diver's, 42.7 mm, 13.2 mm thick, case 00T0/01G0 (6R35)
Same calibre and diameter, different published case - “Willard” · Seiko Prospex Sea diver's, 42.7 mm, 13.2 mm thick, case 01W0 (6R35)
Same calibre and diameter, different published case
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