Seiko Cal. 7131 - 604

The Seiko 7131-604 represents an important milestone in Seiko's 1990 lineup. With its 18mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-4bcd9196c016]

Also known as: Sumo, Navigator

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

22j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1990

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