Seiko Cal. 6631 - 524

Seiko 6631-524

This Automatic model from 1973 features a 39mm Titanium case. Powered by the 6631 caliber with 35j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-9c3d84da7b13]

Also known as: Sumo

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
39mm
Case Thickness
8.1mm
Lug Width
22mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
140m
Dial Color
Blue Sunburst
Jewels
35j
Frequency
36,000 bph
Power Reserve
57 hours
Year
1973

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seikata-wm-9c3d84da7b13