Seiko Cal. 3851 - 665

Seiko 3851-665

The 3851-665 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3851 caliber with 28j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-06dbf3e2f553]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
13.6mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
180m
Dial Color
Cream
Jewels
28j
Frequency
36,000 bph
Power Reserve
56 hours
Year
1981

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