Seiko Cal. 6635 - 612

This Spring Drive model from 1975 features a 35mm Hardlex-Coated Steel case. It features a Silver dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-62980e16dbf8]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

13.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1975

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