Seiko Prospex Alpinist Mechanical

Seiko Prospex Alpinist Mechanical

Seiko Prospex Alpinist Mechanical
Dive by Seiko

Seiko Prospex Alpinist Mechanical

Prospex · Prospex Alpinist Mechanical

Case
39.5 mm
Thickness
13.2 mm
Lug width
20 mm
Crystal
Sapphire
Updated 11 November 2026
About this watch

The Seiko Prospex Alpinist Mechanical is a 39.5 mm watch from the Prospex collection. Its stainless steel case is 13.2 mm thick and 46.4 mm from lug to lug, with 20 mm lugs. It is water resistant to 200 m. The crystal is sapphire.

Your next watch

Find your next watch, not just a brand.

Every watch on Watcheers has its spec sheet in Watch Explorer. Filter by size, material and budget to find the one that fits.

Last update:

11 November, 2026