Seiko Cal. 7131 - 712

This Automatic model from 1974 features a 39mm Hardlex-Coated Steel case. Powered by the 7131 caliber with 21j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-927e8481aef2]

Also known as: Monster, Sea Horse

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1974

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