Seiko Cal. 6291 - 639

The Seiko 6291-639 represents an important milestone in Seiko's 1988 lineup. With its 21mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-08b004a9ef98]

Also known as: Monster, Rally

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

29j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1988

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