Seiko Cal. 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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