Peter, I know of the Conservatory of Music[near 12th St.]..
It was one of my choices to continue music studies after high school, but I went to school in Villanova..

My accordion was custom made[Baccalachio] and was amplified by Sano [Hoboken NJ] in 1964..as was my first 120 bass accordion in 1956[I wish I kept that one too]..the 56 model had the action worked on as well as sound dampening and super amplification..

I will attempt to show a picture here.