My long deceased grandmother was a piano teacher and we had a similar piano at home. I had lessons from the age 8 to 12 and got to Grade 6 or 7, can't remember ATM. Anyhoo, the old piano used to be tuned every year by a blind guy. He was crap at hanging curtains. It seems that, back in the 60's, maybe before, they were the best tuners around due to their heightened hearing abilities.
When I was about 14 or 15, the piano was beyond tuning due to it's age and it was full of woodworm, so we filled it with petrol and set light to it on Guy Fawkes night. It wrote a Stockhausen piece as it burned.
Enjoy your freebee.