Seiko Cal. 5671 - 231

Seiko 5671-231

The 5671-231 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5671 caliber with 22j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-50aaf2a36a96]

Also known as: Monster, Sumo

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
11.0mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
160m
Dial Color
Burgundy
Jewels
22j
Frequency
21,600 bph
Power Reserve
62 hours
Year
1982

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seikata-wm-50aaf2a36a96