Seiko Cal. 7156 - 538

This Spring Drive model from 1978 features a 37mm Hardlex-Coated Steel case. Powered by the 7156 caliber with 34j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-7e6f97e07532]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

34j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1978

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