Seiko Cal. 3866 - 500

The 3866-500 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3866 caliber with 32j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-454ec0e879fa]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Champagne

Jewels

32j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1981

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