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.
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