Seiko Cal. 5637 - 635

The Seiko 5637-635 represents an important milestone in Seiko's 1985 lineup. Powered by the 5637 caliber with 19j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-cb5e4c305769]

Also known as: Tuna, Crown

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1985

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