The “Turtle” gets its nickname from its rounded cushion case, a revival of Seiko’s 6309 divers from the 1970s and 80s. On paper 45 mm sounds huge, but the short lugs help it fit smaller wrists than you’d expect. Its 200 m water resistance and very bright lume make it a real tool, and the many dial variants make it collectible.
Who it’s for
Dive watch fans who want vintage Seiko character with modern reliability, at a price that doesn’t make you afraid to wear it.
Buying tips
- “SRP” references are the original 2016 releases. “SRPE” and later references are refreshed versions. Specs are nearly identical.
- Limited “Save the Ocean” and colorway editions often cost more, especially in Japan-market versions.
- Upgrading the Hardlex crystal to sapphire is popular. Ask whether the watch has been modified.
| Brand | Seiko |
|---|---|
| Reference | SRP777 (and SRPE/SRPC variants) |
| Case size | About 45 mm (cushion case) |
| Case material | Stainless steel |
| Movement | Automatic, Seiko 4R36 |
| Power reserve | About 41 hours |
| Water resistance | 200 m |
| Crystal | Hardlex mineral |
| Production | 2016 – present (variants) |
| Typical market price | around $400.00 (estimate; see tracked prices) |
Seiko Prospex “Turtle” SRP777 price history
How we measure: eBay figures are the median of matching US listings after removing accessories, parts and statistical outliers. "Asking" means listed prices; "sold" means completed sales. Retailer prices are spot checks. Prices change constantly; confirm on the retailer's site.
