Seiko Cal. 3871 - 186

The 3871-186 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3871 caliber with 27j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-9a47e6364733]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Burgundy

Jewels

27j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1986

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