Seiko SRP581
What Should You Pay?
Estimated fair market values. Actual prices vary by condition, completeness, and seller.
Recent Comparable Listings
The Seiko Prospex SRP581, part of the 'Monster' line, is a robust diver's watch featuring a 4R36 automatic movement with hacking and hand-winding capabilities. Its distinctive design includes a cyclops over the day/date window and a blue bezel, contributing to its bold and functional aesthetic making it a popular tool watch.
Specifications
Movement
More from Monster
View all Monster 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.