Seiko Cal. 7131 - 961

Seiko 7131-961

The 7131-961 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7131 caliber with 36j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-927a690f11c5]

Also known as: Sumo, Rally

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
42mm
Case Thickness
10.1mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
150m
Dial Color
Silver
Jewels
36j
Frequency
36,000 bph
Power Reserve
36 hours
Year
1968

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seikata-wm-927a690f11c5