Seiko Cal. 3861 - 729

This Spring Drive model from 1997 features a 41mm Hardlex-Coated Steel case. With its 20mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-47f85ac2ba08]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1997

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