Seiko Cal. 6631 - 189

This Spring Drive model from 1981 features a 39mm Titanium case. With its 22mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-7238e902e10e]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

12.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

80m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1981

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