The PBS video about Andrew Carnegie showed the Welte orchestrion in
the Frick mansion.  There are several pages in Bowers' Encyclopedia
on this subject, and a specific reference to Frick is made on page 642.
I do not know if the one on that page is precisely like the on the
video, but it's awfully close.

I suspect that this machine is maintained by Durward Center in
Baltimore as he is the big expert on the subject in this country.

Harvey Roehl