Seiko Cal. 6638 - 936

Released in 1980, the Cal. 6638 with design code 936 was part of Seiko's domestic market collection. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-cca3ea51a593]

Also known as: Rally

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1980

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