Seiko Cal. 5631 - 299

Seiko 5631-299

This Spring Drive model from 1971 features a 43mm Gold-Plated case. With its 20mm lug width and 13.2mm profile, it sits comfortably on most wrists. [seikata-wm-7a55ea4d78c3]

Also known as: World Timer, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
43mm
Case Thickness
13.2mm
Lug Width
20mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
50m
Dial Color
Black
Jewels
29j
Frequency
28,800 bph
Power Reserve
68 hours
Year
1971

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seikata-wm-7a55ea4d78c3