Seiko Cal. 3866 - 240

The Seiko 3866-240 represents an important milestone in Seiko's 1966 lineup. Powered by the 3866 caliber with 26j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-2d40e7295dfa]

Also known as: Monster, Crown

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

14.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

26j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1966

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