Seiko Cal. 7139 - 775

This Spring Drive model from 1977 features a 35mm Stainless Steel case. Powered by the 7139 caliber with 26j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-146f1ad8159b]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1977

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