Seiko Cal. 5637 - 697

The Seiko 5637-697 represents an important milestone in Seiko's 1978 lineup. Powered by the 5637 caliber with 28j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-83c4df1deeb2]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

160m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1978

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