Seiko Cal. 6131 - 345

Seiko 6131-345

The 6131-345 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6131 caliber with 36j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-3c552ce7b86c]

Also known as: Sumo, Bellmatic

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
43mm
Case Thickness
12.3mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
60m
Dial Color
Burgundy
Jewels
36j
Frequency
28,800 bph
Power Reserve
51 hours
Year
1965

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