Seiko Cal. 5631 - 718

Seiko 5631-718

The 5631-718 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Hardlex crystal and offers 120m of water resistance. [seikata-wm-61a6bbe40162]

Also known as: Samurai, Silverwave

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
11.3mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
120m
Dial Color
White
Jewels
35j
Frequency
21,600 bph
Power Reserve
47 hours
Year
1971

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