The Watchguy has documented the service of an Eterna 1249TC
This movement was one of the first with a rotor with ball bearings. This innovation reduces the wear and tear and improves the efficiency of the automatic winding.
Full movement
Full movement with rotor in a different position
Focus on the ball bearings
Rotor screw and insert removed, unveiling the full ball bearings
Underside of the rotor
Focus on the central winding wheel
Automatic system and bridge
Focus on the reverser wheels
The underside of the automatic bridge
Automatic underside cover removed
Automatic wheel train
Focus on the double wheeled reversers
Movement with the automatic bridge removed
Focus on the click
Barrel bridge and train bridge removed
The movement has central seconds and achieves this by superimposing the centre and fourth wheels
Centre wheel (underneath) and fourth wheel. The Fourth wheel staff goes through the cente wheel pivot and the cannon pinion
The long escape wheel pinion is driven by the fourth wheel
Fourth wheel removed, unveiling the centre wheel underneath
Centre wheel bridge removed
Fourth wheel with its long staff carrying the seconds hand
Third wheel with its long pinion reaching through the centre wheel bridge
