Seiko Cal. 5641 - 284

This Spring Drive model from 1991 features a 41mm Hardlex-Coated Steel case. Powered by the 5641 caliber with 24j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-1671ef19bcb4]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

24j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1991

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