Seiko Cal. 6638 - 930

The Seiko 6638-930 represents an important milestone in Seiko's 1973 lineup. Powered by the 6638 caliber with 29j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-ab4fd596b141]

Also known as: Shogun

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1973

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