Seiko Cal. 5631 - 333

Seiko 5631-333

This Automatic model from 1991 features a 34mm Hardlex-Coated Steel case. With its 18mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-a1e1bd351a7c]

Also known as: Tuna

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
34mm
Case Thickness
10.8mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
50m
Dial Color
Black
Jewels
18j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1991

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