Seiko Cal. 6631 - 960

Seiko 6631-960

This Quartz model from 1980 features a 46mm Stainless Steel case. The Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-2bf9c5fa3bdb]

Also known as: Monster, Bullhead

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
46mm
Case Thickness
10.0mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
110m
Dial Color
White
Jewels
23j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1980

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