Seiko Cal. 3866 - 326

The Seiko 3866-326 represents an important milestone in Seiko's 1966 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-e4cd1dd16f13]

Also known as: Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Burgundy

Jewels

32j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1966

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