Laurent:
Each of us has his or her own opinion regarding what the best years for Steinway pianos are.
I want, however, to thank you for your brave, completely unsolicited, initiative in stepping in to offer instruction as to the defective nature of my "very old and very small" piano. Blissfully deluded and ignorant as I was, I had been extremely happy with this piano for many years and even thought myself lucky to have found it - - until you revealed my delusion and made me painfully aware of its defects. What is even more remarkable is that your extraordinary perceptive powers allowed you to arrive at this judgement without ever having actually seen or heard the instrument in question. (My insurance agent, lacking such powers, foolishly accepted the appraised value of my piano.)
On the one purely factual matter at issue, I think we must agree that, according to Steinway, the model B is 211 cm in length - - but, again, whether this means that the Model B is large, medium, small or "very small" is entirely a matter of opinion. (If size matters to you, you might check out the Rubenstein R371 - - 371 cm in length. You can see and read about it at
http://www.rubensteinpianos.com/)
Thanks again for your instruction and help.