Seiko Cal. 6638 - 939

The 6638-939 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6638 caliber with 19j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-b26838d29ac9]

Also known as: Emperor

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1972

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