Seiko Cal. 7031 - 591

This Hand-Winding model from 1987 features a 37mm Hardlex-Coated Steel case. It features a Silver dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-0ba9c6c08fd3]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

23j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1987

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