Seiko Cal. 6631 - 863

Seiko 6631-863

The 6631-863 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6631 caliber with 34j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-1a867c80248d]

Also known as: Crown, Emperor

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
44mm
Case Thickness
12.7mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
150m
Dial Color
Burgundy
Jewels
34j
Frequency
21,600 bph
Power Reserve
60 hours
Year
1965

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