Thanks for your question. Welcome to JustAnswer, it will be my pleasure to help you. My name is***** am working on this for you now.
Has your piano been regularly tuned and maintained? Does the player fully play the music rolls?
Have any of the internal mechanics been replaced or restored over the years or is it all still as originally built?
Also if you have any pictures, particularly of the internal mechanics which you could attach on here using the paperclip or the +Add button on the menu bar in the reply section, that would be very helpful.