Seiko Cal. 6642 - 953

The Seiko 6642-953 represents an important milestone in Seiko's 1967 lineup. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-2c103ef57c1f]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1967

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