Seiko Cal. 6634 - 628

Seiko 6634-628

This Spring Drive model from 1967 features a 34mm PVD Black case. Powered by the 6634 caliber with 19j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-f5b6297c18ce]

Also known as: Sumo

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
34mm
Case Thickness
13.8mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Burgundy
Jewels
19j
Frequency
36,000 bph
Power Reserve
72 hours
Year
1967

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