Your handle was manufactured by Super Motors Inc. in Cleveland, Ohio in 1945 & 1946. These are the same folks that made the Delong .30. The Delong was one of the ignition engines that was strong enough to run on glow fuel and not blow up. They were used as speed engines back in the late 1940's.
The handle is a hard point, and was supposedly made out of the same aluminum that the Delong crankcases, heads, and backplates were cast from. The majority of the early controline handles were hard points.