Seiko Cal. 3864 - 587

This Spring Drive model from 1966 features a 43mm Two-Tone case. Powered by the 3864 caliber with 26j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-185a2c8ea1d4]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

12.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

170m

Dial Color

Green

Jewels

26j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1966

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