Seiko Cal. 5641 - 638

This Automatic model from 1982 features a 43mm Gold-Plated case. Powered by the 5641 caliber with 20j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-2828d8fb37e7]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1982

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