Seiko Cal. 6391 - 639

The Seiko 6391-639 represents an important milestone in Seiko's 1969 lineup. With its 18mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-c042abcec669]

Also known as: Pogue, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

34j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1969

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