Seiko Cal. 3871 - 105

The Seiko 3871-105 represents an important milestone in Seiko's 1966 lineup. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-b1ae546371de]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Burgundy

Jewels

26j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1966

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