Seiko Cal. 7137 - 631

The Seiko 7137-631 represents an important milestone in Seiko's 1988 lineup. With its 19mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-3f1540bc8913]

Also known as: Sumo, Silverwave

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Burgundy

Jewels

29j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1988

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