Seiko SPB531J1
Prospex Alpinist Night Sky
What Should You Pay?
Estimated fair market values. Actual prices vary by condition, completeness, and seller.
A European market exclusive limited to 3,000 pieces, the Night Sky Alpinist features a deep blue sunburst dial inspired by the night sky. This modern interpretation of the classic Alpinist design maintains the signature inner rotating compass bezel and cathedral hands while offering enhanced water resistance and a modern automatic movement.
Specifications
Movement
More from Alpinist
View all Alpinist 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.
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.
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.