Seiko Cal. 7131 - 372

The Seiko 7131-372 represents an important milestone in Seiko's 1969 lineup. With its 18mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-0964d343a134]

Also known as: Sumo, Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1969

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