Seiko Cal. 6635 - 568

This Spring Drive model from 1970 features a 42mm Two-Tone case. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-340d30d087cd]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1970

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