Seiko Cal. 3866 - 303

The 3866-303 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3866 caliber with 27j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-777b38dcd9e1]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

14.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1998

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