Seiko Cal. 3831 - 221

This Hand-Winding model from 1985 features a 40mm Stainless Steel case. Powered by the 3831 caliber with 32j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-e134a704fc5f]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1985

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