Seiko Cal. 5631 - 107

This Automatic model from 1984 features a 36mm Hardlex-Coated Steel case. It features a Burgundy dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-99845183f056]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

29j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1984

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