Seiko Cal. 4521 - 641

This Spring Drive model from 1971 features a 46mm Stainless Steel case. Powered by the 4521 caliber with 23j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-02f954d9fcbe]

Also known as: Silverwave, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

14.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

23j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1971

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