Here is a Superman children’s belt and buckle produced in 1981 by LEE. The belt is elastic and printed with artwork of Superman flying through the clouds. The speech balloons say:
“It’s a bird!” “It’s a plane!” “It’s SUPERMAN!“
The buckle is made of brass and has an enameled ‘S’ symbol on its face.
Often, the belt portion will be lost and the buckle will be the only thing left in someone’s drawer. When these buckles end up on online auction sites they end up, understandably, being dated as a vintage item from 1944 since that is what is molded on the back of the buckle. This was meant as a character copyright and not as a production date.