Seiko Cal. 6636 - 164

This Spring Drive model from 1975 features a 41mm Two-Tone case. With its 20mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-e293a2a91285]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1975

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