Hi there!  A few days ago I found an incomplete action of a (I think)
Hupfeld Triphonola.  It belonged to a Roenisch piano that was sold
without the player mechanism.  I have the complete stack, 'solo'
device, pedal pneumatic, motor tempo controller, an extra original
box with leather valves, hanging springs, outside aluminum pots and
some other things.

The tracker bar has the 88 notes plus 11 holes (6 left, 5 right of
the 88's) so it must be a 'reproducer' player.  What I'd like to know
is more information about it, because I just can't find any, and I'd
like to find also if possible a tube diagram, as well all the possible
information about this instruments.  The stack number is 37607; this
might help you in available information for it.

Kind regards

Miguel de Mattos
Lisboa, Portugal