Seiko Cal. 3860 - 720

The Seiko 3860-720 represents an important milestone in Seiko's 1979 lineup. Powered by the 3860 caliber with 29j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-26412c0cb55b]

Also known as: UFO, Arnie

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

14.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Silver

Jewels

29j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1979

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