Max,

Old Mr. Zapf, founder of Zapf's Music, was an amazing zither player, and, though he passed on a while back, I believe that there are still a couple people in his family who play and, at least til a few years ago, teach, at the original store, which, I think, is off of Old York Road, in Philadelphia--

Anyway, they were always happy to talk about the instruments, and to haul out a one and play a bit, at least back when I lived there--