Hello All. Found this at a 1910 home site. It's cast iron with a brass tab on one end, very fine threads on the large ID, and no threads anywhere else. Thanks for any ideas on it.
HH C9
Wow, Thanks Drew, great ID!! An Edison reproducer is exactly what this thing is. With your reply I found the attached images. It comes from an Edison Amberola cylinder phongraph produced c.1915. These parts are decribed as having no identifying marks which made it very difficult to figure out.