introduced the Alpinist wristwatch in 1961. SARB017 was introduced and became an instant success.

Seiko Alpinist Automatic Green Dial 

SARB 017

Movement
Automatic
Caliber 6R15
Spring bars
Escapement frequency: 21,600 beats per hour (6 beats per second)
Accuracy: 25/-15 seconds per day
Power reserve: 50 hours

Exterior
Case Material: Stainless Steel
Case Size: Diameter 38mm, Thickness 12mm
Case Back: Screw-down steel (solid)
Lug width: 20mm
Crystal: Sapphire
LumiBrite: Hour markers, hour minute second hands
Band width: 20mm
Band: Croco leather with brushed silver hardware
Clasp: Buckle

Other Details
Bezel: Fixed polished stainless steel rotating inner compass
Date display
Water resistance 200m
23 Jewels