OK I can now reply back to this thread.
First of all, it was a Yamaha C1, in pretty good shape, I got a lot of practice in.
Secondly, why I thought this was a fun question, and all of that:
We were taking the Celebrity Summit, with a suite that only two of exist on that ship, with 2,500 plus passengers. So we were one-percenting this cruise. But we are not one-percenters. It was a fun extravaganza that we went for, and enjoyed. The wild part was that with a grand piano, parquet flooring, and two Jacuzzis this suite was not "bling", there were no golden toilet bowls. So we went a bit overboard, and in the end enjoyed it.
Now back to the piano: C1, already too voluminous for the suite. Not badly maintained, but it now loses tune more quickly. But I loved it nonetheless, and it was a great experience.
I have a C7 at home...
And no, I am not a sectarian, I am 52.