Seiko Cal. 6635 - 880

This Hand-Winding model from 1979 features a 36mm Gold-Plated case. Powered by the 6635 caliber with 29j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-acd9ab8ad95f]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Cream

Jewels

29j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1979

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