Seiko Cal. 3866 - 306

The 3866-306 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3866 caliber with 33j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-83bd1cee43e8]

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1982

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