Seiko Cal. 5631 - 991

The 5631-991 is a sought-after Kinetic piece from Seiko's golden era. With its 19mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-30c0607b233f]

Also known as: Pogue

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1970

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