Seiko Cal. 4541 - 840

This Spring Drive model from 1965 features a 44mm Hardlex-Coated Steel case. Powered by the 4541 caliber with 25j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-20f629941fc1]

Also known as: World Timer, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

120m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1965

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