Seiko Cal. 6631 - 144

Seiko 6631-144

The 6631-144 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6631 caliber with 31j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-651e4d1612dc]

Also known as: Samurai, Flighty

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
41mm
Case Thickness
14.6mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
30m
Dial Color
Champagne
Jewels
31j
Frequency
21,600 bph
Power Reserve
54 hours
Year
1973

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seikata-wm-651e4d1612dc