Seiko Cal. 3860 - 890

This Spring Drive model from 1974 features a 39mm PVD Black case. Powered by the 3860 caliber with 21j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-9ca44753a606]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1974

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