I am looking for information, technical details and pictures of
Plerodiénique music boxes for publication in a planned article in
the journal of the Swiss Friends of Mechanical Music www.sfmm.ch.
Thank you very much for your help!

Peter Both - Schweizer Freunde Mechanischer Musik
http://www.sfmm.ch/ 
pboth@swissonline.ch.geentroep [delete ".geentroep" to reply]

 [ Plerodiénique box - A cylinder music box with the cylinder made in
 [ two parts, each of which shifts laterally outward from the center
 [ at a different time to provide continuous music during the normal
 [ tune-changing process.  See the video at
 [ https://www.youtube.com/watch?v=iB4HX5hMVdE  -- Robbie