Seiko Cal. 3866 - 909

The Seiko 3866-909 represents an important milestone in Seiko's 1982 lineup. Powered by the 3866 caliber with 20j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-1d95a7853496]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

42mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1982

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