Seiko Cal. 3866 - 160

Seiko 3866-160

The 3866-160 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3866 caliber with 21j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-aa1f7693e9f6]

Also known as: Sumo, Tuna

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
8.0mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
120m
Dial Color
Black
Jewels
21j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1993

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