Seiko Cal. 5631 - 816

This Automatic model from 1983 features a 36mm Hardlex-Coated Steel case. With its 18mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-966c9cf3cd02]

Also known as: Rally

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1983

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