Seiko Cal. 5641 - 238

This Spring Drive model from 1968 features a 37mm PVD Black case. Powered by the 5641 caliber with 27j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-3921a941b2ff]

Also known as: Goldfeather, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Green

Jewels

27j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1968

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