Seiko Cal. 3865 - 860

The Seiko 3865-860 represents an important milestone in Seiko's 1981 lineup. With its 21mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-93a26080f8d5]

Also known as: Helmet, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1981

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