I hope each of you reads this: THANK YOU for your replies. I am blown away. What a great resource this site is. Exactly the info I was looking for.

Separate question, and I know this is not an art ID forum, but because it is related to the sheet music painting-- I spotted what looks like a name signed on the score (the last pic is a close-up), and to my eye it looks like Henderson. Any other guesses on the signature?

Btw this set shows more pics of the piano.

Many thanks to you all again for the ID on Auld Lang Syne. It has been a great help to me.