Seiko Cal. 3821 - 641

This Hand-Winding model from 1977 features a 42mm Stainless Steel case. Powered by the 3821 caliber with 18j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-7861779d5757]

Also known as: Shogun, Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1977

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