A long tradition of developing and producing superior mechanical movements
Round self-winding movement with Eterna Spherodrive

This new movement follows the introduction of hand-wound calibres 3505 and 3510. Still equipped with the Eterna Spherodrive, it's today self-winding and round.

GMT function

By means of the crown the hour of a second time zone can be set on the counter at 6 o'clock.

Less friction and a lower loss of energy, which gives the movement greater longevity

In a conventional watch movement, one end of the barrel arbour supporting the barrel and the mainspring pivots on the base plate, and the other in a bridge. In the Eterna 3843 movement with Eterna Spherodrive, the plain bearing for the barrel drum and the two plain bearings for the arbour in the base plate and in the bridge are replaced by an innovative lubrication-free double ball bearing mechanism. Eterna holds the worldwide patent for this innovation.

Technical details


  • Calibre : Selfwinding Eterna 3843
  • Functions : h, min, small second, date, GMT
  • Diameter : 30 mm
  • Height : 6.10mm
  • Lines : 13 1/4
  • Frequency : 28,800 v.p.h.
  • Power reserve : 72h
  • Number of jewels : 26
  • number of ball bearing : 4