1954 GM MOTORAMA souvenir coin

Made of bronze (?) this souvenir coin commemorates the GENERAL MOTORS MOTORAMA OF 1954. Those exact words appear around the perimeter of one side with a large GM and arrow in the center, the other side has a starburst shape and figure of a car as its design, with the year 1954 and names of the 5 GM divisions, (then) CHEVROLET, PONTIAC, OLDSMOBILE, BUICK, & CADILLAC. It measures 1-1/4" across. It was dirty enough to be difficult to read when first found, it got just the slightest rub with a sponge and a little BarKeeper's Friend cleanser so I could really see what it is and what's on it.