I am restoring Erard’s harp #816. I have been restoring harps (only very old ones) for the past 40 years, and if you still have this harp I could restore it. A qualitifed repair person will charge a considerably amount to restore your harp. The harp I am working on at the moment will cost the owner 9,000.00 to 10,000.00 dollars. This is a concertive estment. Much will depend on the shap your harp is in. If you look up under the top where the two brass plates hold the mechanical parts. Look up to where the rods connect to the mechanical parts, with a flashlight you will see the date. The date is stamped on the brass swivel. If you are not up to restoring your harp. I might be interested in buying it. My name is Walter Herman my email is waltherman@hotmail.com.