Hello dicke,
I am curious about your Mason & Hamlin "CC" you mention. I have owned two "CC-1" models which measured 9'3". Do you have any pictures of yours? What are the letters/numbers in the rear bass corner of the plate? Does your piano have the "tension resonator". To the best of my learning from Mason & Hamlin specialist, Paul Monachino, there are "CC" models 9'3" in length with very wide tails and mostly no resonator bars. (Final production "CC" may have had them) The "CC-1" followed, also at 9'3" with a slightly less wide tail (although still wide) This piano had a heavier plate construction and the full tension resonator system. Then the "CC-2 followed which was more of a Steinway & Sons "D" clone in its shape and scale. It too, measured 8'11". I lent my second "CC-1 to the Mason & Hamlin company while they developed their new "CC-94".
Thanks, Tali