Seiko Cal. 7160 - 556

This Spring Drive model from 1989 features a 43mm Hardlex-Coated Steel case. Powered by the 7160 caliber with 27j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-fe633b94b1f5]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1989

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