Seiko Cal. 3861 - 649

The Seiko 3861-649 represents an important milestone in Seiko's 1967 lineup. With its 20mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-f97348452f94]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1967

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