Seiko Cal. 6638 - 769

This Automatic model from 1979 features a 41mm Hardlex-Coated Steel case. Powered by the 6638 caliber with 32j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-062dcd66dd44]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1979

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