Hi everyone,  Could someone tell me the best way to adjust the governor
of my Bremond music box?

After a good cleaning, I see that the problem of adjustment is repeated
on all the music boxes.  It is always very difficult to give the right
speed at the endless screw and I suppose there's an easy way to make
this adjustment that a "good soul" could tell me.

Thank you in advance.

Greetings from Geneva, Switzerland,
Jean-Marc Cerutti