A properly rebuilt CC2 is indeed a rare and special piano.
"Rare" seems to be the operative word. Though I have run across a number of M&H-CC, I seem to encounter more of the Baldwin 9-footers and the Chickerings.
Keith, is it your experience that the Masons are more of a 'rare' piano than the Baldys? Have they simply been produced in lower numbers throughout history?
(Sorry if this is a bit off-topic.)
There are 3 CC designs from the Boston Mason years ( 1900 - 1932 ) as far as I know. There is a 9'4" without the tension resonator which I call the CC. There is a 9'4" with the tension resonator which is generally called the CC1 and then there is this one, which is right around 9' and is known as the CC2. In terms of rarity, the older CC is the most rare, followed by the CC1 and then the CC2.
They are all very rare. My guess is Mason made at most 250 concert grands during this period and probably a lot less. Who knows how many are even still out there. We are talking about pianos from a century ago. As an aside, I am very excited that I just came across another CC2 from this period.
The Boston period Mason concert grands are certainly more rare than Baldwins of the same period. Baldwin made a lot more pianos. After 1932, Baldwin concert grands were produced in a much higher quantity. While Mason was hot stuff with performers and on concert stages during the Boston period, they really lost that reputation and approach after. They still made concert grands, and some are better than others, but some are real disasters too. You can tell they just lost touch with the artists and that part of the business.
In the mean time, Baldwin was the only real competition for artists for Steinway. From the 30s until even the 80s, Baldwin concert grands were regularly played in major venues by major artists. Claudio Arrau, Jorge Bolet, Earl Wild, Andre Watts come to mind immediately. There was a real market for Baldwin concert grands and a real demand, and a company that valued artists as an important part of their marketing, so there are a lot more out there.