Seiko Cal. 3821 - 381

Released in 1991, the Cal. 3821 with design code 381 was part of Seiko's domestic market collection. Powered by the 3821 caliber with 25j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-2a6957c6596a]

Also known as: Sumo, Crown

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

12.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1991

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