If one possessed a returning coin and bought something with it, the coin came back afterwards. It would also bring back all the money that that person had ever possessed. In those times, money was made of metal. One who possessed such a coin could enjoy a beautiful life. Naturally, in the long run, such a coin would find its way to a bank. There they were easily recognized. They had specialists there. They were not kept together with other coins, lest they be carried out of the bank. Instead, a hole was pierced in such a coin and it was nailed to the wall. When the time came for that coin to return, it would start revolving on that nail so violently, that it would file off the head of the nail and find its way to the former master. But then the coin would be of no value, because it had a hole in the middle.
They used magic to do that.

(Recorded in 1959)