The Speed Ring is a "Chinese flying top" and the high speed model of Duncan's very short-lived Jo-Jo line, which was produced in the late 60's or early 70's. It was discontinued and taken off the shelves due to poor sales. The units that were removed from market were destroyed, so very few of the Jo-Jo toys that were already purchased before the line's discontinuation remain. As a result, it is almost completely forgotten, as there is very little information on it.