Seiko Cal. 3856 - 139

Seiko 3856-139

The 3856-139 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 3856 caliber with 25j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-19e2a6978aea]

Also known as: UFO, Baby Tuna

Specifications

Movement
Kinetic
Case Material
Gold-Plated
Case Width
37mm
Case Thickness
14.5mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Green
Jewels
25j
Frequency
21,600 bph
Power Reserve
37 hours
Year
1988

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