Seiko Cal. 3866 - 903

Released in 1991, the Cal. 3866 with design code 903 was part of Seiko's domestic market collection. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-2cc3ddf0e739]

Also known as: Sumo, Rally

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

18j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1991

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