I am amazed at what I find the more I restore my 1958 Slings. This morning I got down to the bass drum hoops. One bass drum hoop is black plastic. The other bass drum hoop is wood. The black plastic bass drum hoop is wider than the wood and the inlay groove on the black plastic is wider. Since the set was only seven years old when I bought the set used, both hoops are likely original. When I purchased the set in 1967, the inlay strips were in both hoops.
Have any of you ever heard of Slings using one plastic and one wood bass drum hoop in the 1950's?