Seiko Cal. 6645 - 930

This Spring Drive model from 1965 features a 36mm Hardlex-Coated Steel case. Powered by the 6645 caliber with 32j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-ee379333bb33]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

90m

Dial Color

White

Jewels

32j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1965

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