Seiko Cal. 3866 - 238

The 3866-238 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3866 caliber with 33j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-f159ce8b689a]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

12.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1977

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