Seiko Cal. 0770 - 387

This Hand-Winding model from 1981 features a 42mm Hardlex-Coated Steel case. Powered by the 0770 caliber with 34j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-1da9ffb7d1ee]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1981

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