Seiko Cal. 6638 - 811

This Hand-Winding model from 1975 features a 39mm Gold-Plated case. Powered by the 6638 caliber with 22j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-d2922b2dda26]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1975

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