Tony the point here is that even older KB's can sound just as good or better then newer models...
Donny,
That's why I posted that clip with Rudy Rosa a few weeks back, all his KBs are collector's items.... my point was it is difficult to tell any KB being play blind unless one KB has a particular sound that no other does, and therefore unique, now find us one of them and see if we can guess
Many a good tune played on an old fiddle.
Donny as long as you can tell the difference between a Steinway
and a Stradivarius you will be OK