Former piano shop on Dupont near Perth/Symington?

Someone emailed me with the following question:

Subject: A piano shop on north side of dupont near the Royce Dupont Chicken Farm @Perth or Symington

"I am searching for any information about a piano shop on Dupont Street, North Side around Perth or Symington around 1975. Does anybody there remember the name of the shop or the proprietor? He was German. Are there any photos? Very interesting story attached to this location.
Thank you."

Anyone have any idea about this? I'm quite curious to hear the story too. Post your replies here.

Updated with corrected date.