Seiko Cal. 6631 - 587

The 6631-587 is a sought-after Hand-Winding piece from Seiko's golden era. With its 18mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-91718ea2ab15]

Also known as: Shogun, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

110m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1979

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