Seiko 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