Seiko Cal. 3866 - 761

Released in 1982, the Cal. 3866 with design code 761 was part of Seiko's domestic market collection. With its 21mm lug width and 14.0mm profile, it sits comfortably on most wrists. [seikata-wm-6cb2f6cf54af]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

60m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1982

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