Seiko Cal. 5637 - 712

The Seiko 5637-712 represents an important milestone in Seiko's 1975 lineup. Powered by the 5637 caliber with 30j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-1176df10ff05]

Also known as: Bullhead, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Cream

Jewels

30j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1975

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