Seiko Cal. 6635 - 558

This Spring Drive model from 1965 features a 43mm Hardlex-Coated Steel case. The Coin-Edge bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-78fd6cdea7ec]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Silver

Jewels

26j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1965

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