Seiko Cal. 6631 - 112

This Automatic model from 1977 features a 46mm Hardlex-Coated Steel case. It features a Silver dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-8d6128574667]

Also known as: Shogun, World Timer

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1977

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