Seiko Cal. 6642 - 735

This Spring Drive model from 1979 features a 43mm Stainless Steel case. Powered by the 6642 caliber with 22j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-90806641f09a]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

14.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1979

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