Seiko Cal. 5640 - 541

This Spring Drive model from 1970 features a 34mm Hardlex-Coated Steel case. Powered by the 5640 caliber with 22j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-42b3948e4d4c]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

White

Jewels

22j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1970

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