Seiko Cal. 7031 - 523

This Hand-Winding model from 1973 features a 40mm Hardlex-Coated Steel case. It features a White dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-888cd95b5b4c]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

10.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

White

Jewels

20j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1973

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