... not likely that the sound is produced by a loose part of the movement
bouncing around in the case. As the 2008 RdM is equipped with cera-
mic ball bearings on the rotor I could imagine that the sound orignates
there. The ceramics are not lubricated (unlike steel ball bearings) and
therefore produce some noise when the watch is shaken and the rotor
comes into movement. When you hold the watch near your ear and turn
it you should hear the sound of the ball bearings and the clicking sound
of the winding system.
A nice watch by the way.
Cheers
Christian