Seiko Cal. 5631 - 830

Seiko 5631-830

This Automatic model from 1979 features a 36mm Two-Tone case. With its 18mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-50d63866e054]

Also known as: Navigator

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
36mm
Case Thickness
15.6mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
100m
Dial Color
White
Jewels
34j
Frequency
36,000 bph
Power Reserve
52 hours
Year
1979

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