Seiko Cal. 3866 - 861

The Seiko 3866-861 represents an important milestone in Seiko's 1979 lineup. With its 22mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-3f1122296ea0]

Also known as: Sumo, Crown

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

110m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1979

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