Seiko SBDY051
What Should You Pay?
Estimated fair market values. Actual prices vary by condition, completeness, and seller.
The Seiko Prospex King Turtle SBDY051 (also known as SRPE05 in some markets) is a robust diver's watch featuring a sapphire crystal, a ceramic bezel insert, and Seiko's 4R36 automatic movement. It is part of the 'Turtle' line, known for its distinctive cushion-shaped case. This particular model has a black dial, improving upon the original Turtle with upgraded materials.
Specifications
Movement
More from Turtle
View all Turtle references →Related Guides & Articles
The best watches you can buy under $1,000 in 2026 — pre-owned and new picks from Seiko, Hamilton, Orient, Tissot, and G-Shock with current prices.
Current secondhand Seiko prices — from the Seiko 5 to Presage and Prospex. See pre-owned median prices, ranges, and the best Seiko watches to buy used.
Learn how to compare pre-owned watch prices across marketplaces — understand market value, spot overpriced listings, and find the best deal on the watch you want.
The best deals on pre-owned watches this month — undervalued models from Rolex, Omega, Tudor, Seiko, and more, with current market prices and why they're worth buying.