D.L. Bullock drew my attention to a Mason & Risch Duo-Art piano.  Mason
& Risch is a very well known and quite common brand of piano in Canada.
The business was founded by Thomas Gabriel Mason and Vincent Risch in
1871 in Toronto.   I don't think there was a link to the Mason & Hamlin
company.

I have seen several Mason & Risch players, and two were Duo-Art.  Perhaps
I am missing D.L.'s point, but I don't see what makes this piano very
rare or a "specialty and not a production model."  Am I overlooking
something?

Jurgen Goering
Vancouver Island, B.C., Canada
http://www.pianofortesupply.com/