Seiko Cal. 6636 - 475

This Spring Drive model from 1978 features a 42mm Stainless Steel case. With its 18mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-377979ccc43a]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

Cream

Jewels

33j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1978

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