Seiko Cal. 3866 - 101

The Seiko 3866-101 represents an important milestone in Seiko's 1969 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-e63dc7707917]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1969

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