Seiko Cal. 6631 - 523

The Seiko 6631-523 represents an important milestone in Seiko's 1990 lineup. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-fed7484da651]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1990

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