Seiko Cal. 5631 - 125

Seiko 5631-125

This Quartz model from 1981 features a 41mm Hardlex-Coated Steel case. With its 19mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-5397cdfe39d9]

Also known as: Tuna, Sportsmatic

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
12.5mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
130m
Dial Color
Navy
Jewels
34j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1981

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