Seiko Cal. 5643 - 381

This Hand-Winding model from 1975 features a 45mm Two-Tone case. Powered by the 5643 caliber with 33j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-d958c18958d0]

Also known as: Sumo, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Cream

Jewels

33j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1975

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