Seiko Cal. 5638 - 866

The Seiko 5638-866 represents an important milestone in Seiko's 1976 lineup. Powered by the 5638 caliber with 36j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-ed4843030aad]

Also known as: Bellmatic

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1976

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