Seiko Cal. 6638 - 943

Released in 1981, the Cal. 6638 with design code 943 was part of Seiko's domestic market collection. Powered by the 6638 caliber with 22j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-cd9c9bf33fc4]

Also known as: Shogun, UFO

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

White

Jewels

22j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1981

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