Seiko Cal. 5631 - 770

Seiko 5631-770

The 5631-770 is a sought-after Quartz piece from Seiko's golden era. It features a Burgundy dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-aecf08f148ce]

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
37mm
Case Thickness
9.8mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
200m
Dial Color
Burgundy
Jewels
26j
Frequency
21,600 bph
Power Reserve
71 hours
Year
1975

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