Seiko Cal. 5641 - 958

This Spring Drive model from 1981 features a 45mm Hardlex-Coated Steel case. Powered by the 5641 caliber with 28j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-794bf41864c7]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1981

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