Seiko Cal. 0770 - 489

This Hand-Winding model from 1983 features a 41mm Hardlex-Coated Steel case. Powered by the 0770 caliber with 17j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-0fed534a8058]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

White

Jewels

17j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1983

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