Seiko Cal. 3871 - 271

Seiko 3871-271

The 3871-271 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3871 caliber with 25j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-818a450ea500]

Also known as: Sumo, Bellmatic

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
37mm
Case Thickness
8.3mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
90m
Dial Color
Cream
Jewels
25j
Frequency
36,000 bph
Power Reserve
54 hours
Year
1966

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seikata-wm-818a450ea500