Seiko Cal. 6637 - 552

This Kinetic model from 1977 features a 44mm Titanium case. Powered by the 6637 caliber with 27j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-359ba8595c29]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

44mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

White

Jewels

27j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1977

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