Seiko Cal. 3866 - 769

The Seiko 3866-769 represents an important milestone in Seiko's 1972 lineup. Powered by the 3866 caliber with 21j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-b04a65cab4ba]

Also known as: Monster, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

37mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1972

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