Seiko Cal. 7131 - 466

This Spring Drive model from 1967 features a 46mm Hardlex-Coated Steel case. Powered by the 7131 caliber with 28j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-97ec19b1f643]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1967

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