Seiko Cal. 6631 - 834

Seiko 6631-834

The 6631-834 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6631 caliber with 27j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-f4e3379025fd]

Also known as: UFO, Silverwave

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
44mm
Case Thickness
9.0mm
Lug Width
18mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
110m
Dial Color
Black
Jewels
27j
Frequency
36,000 bph
Power Reserve
56 hours
Year
1980

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