Seiko Cal. 6637 - 934

The Seiko 6637-934 represents an important milestone in Seiko's 1967 lineup. Powered by the 6637 caliber with 18j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-96afbb027253]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1967

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