Seiko Cal. 6391 - 638

The Seiko 6391-638 represents an important milestone in Seiko's 1974 lineup. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-c5dc7aca5f29]

Also known as: UFO, Rally

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1974

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