Seiko Cal. 6636 - 166

This Spring Drive model from 1981 features a 36mm Titanium case. With its 18mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-8c533e32313d]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

20j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1981

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