Seiko Cal. 3866 - 636

This Spring Drive model from 1979 features a 41mm Two-Tone case. With its 19mm lug width and 14.4mm profile, it sits comfortably on most wrists. [seikata-wm-29ae429c0795]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1979

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