Seiko Cal. 7156 - 631

This Spring Drive model from 1984 features a 42mm Hardlex-Coated Steel case. Powered by the 7156 caliber with 30j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-3d19a660b508]

Also known as: Crown, Arnie

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1984

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