In 1928, Welte-Mignon Corp. offered a remote 8-roll carousel changer
for the Licensee format piano called the "Welte Musicalle".  It used
a special organ type magnet for the stack underneath the piano.

I know of one complete "Musicalle" out of a piano, but perhaps there
are a few more out there and perhaps someone has just the stack from
one of these.  I am in need of these special magnets.  I am sending
Robbie a photo showing what they look like but if anyone is curious or
thinks they have one of these stacks, email me and I'll send the photo
on to you.

Thanks,
Dave Krall

 [ I'll put the photo image under "Magnet Valves" at
 [ http://www.mmdigest.com/Gallery/Tech/  -- Robbie