Seiko Cal. 5631 - 933

Seiko 5631-933

The Seiko 5631-933 represents an important milestone in Seiko's 1972 lineup. It features a Silver dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-248f60656ffe]

Also known as: Sumo, Silverwave

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
40mm
Case Thickness
10.9mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Silver
Jewels
23j
Frequency
21,600 bph
Power Reserve
69 hours
Year
1972

Related Models

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