Seiko Cal. 5691 - 327

Seiko 5691-327

The 5691-327 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5691 caliber with 31j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-f7f3166deffa]

Also known as: Bullhead

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
44mm
Case Thickness
8.1mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
140m
Dial Color
Cream
Jewels
31j
Frequency
36,000 bph
Power Reserve
46 hours
Year
1977

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