You can confidently date this long-produced gypsy witch clanger to the 1950s. How? Earlier versions used wood balls for both sides. As with all tin litho manufacturers, T. Cohn had to find a way to compete in the cutthroat 1950s thanks to an onslaught of cheaply made Japanese products. One of their cost saving measures was to replace the wood balls with these unattractive flat-stamped pieces of tin. I prefer the earlier versions.
Mark B. Ledenbach's vintage Halloween collectibles blog.