Seiko Cal. 6631 - 101

This Quartz model from 1965 features a 41mm Titanium case. The Coin-Edge bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-909d2962b7d8]

Also known as: Sumo, Emperor

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

9.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1965

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