Seiko Cal. 5631 - 520

Seiko 5631-520

This Hand-Winding model from 1979 features a 43mm Hardlex-Coated Steel case. It features a White dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-b4547bc2c39a]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
8.9mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
70m
Dial Color
White
Jewels
29j
Frequency
21,600 bph
Power Reserve
43 hours
Year
1979

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