Seiko Prospex Tuna Grey
Ref: SRPE31, SRPE31K1
Features:
- Movement: 4R36 Automatic 24 Jewels
- 41 Hour power reserve
- 21,600 vph or 6 beats per second
- Hand winding and hacking
- Case size 43.2mm
- Silicon strap
- Hardlex crystal
- Lumibrite hands, indexes, and bezel
- Unidirectional rotating bezel
- Water resistance: 20 bar (200m)
- Screw down crown
- Solid case back, screw type
- 3 year Seiko warranty