Congratulations, your coin is called a "So-Called Dollar" minted exclusively to be handed out at Ford's 1933 N.Y. auto exposition! I believe it's aprox 1-1/8 diameter. I've not seen your type on
ebay or or available by performing a google search of 1933 ford coin "30 years of progress" so therefore yours could be of higher value or rare. Test the waters with
ebay and maybe send one of the best coins to NGC for grading. The common larger 1933 progress Ford coin with grill is NGC HK-465 and the 1934 Ford auto exposition coin is HK-466. Do not clean your coins.

Anyway, Ford Motor Company's brass coins were created for the 1933 Detroit and New York Auto Shows, NOT for the world's fair in Chicago. Presumably, these coins were handed out for free during the shows.
The Detroit Show opened on October 21, 1933 in the Detroit Convention Hall. Its theme was to celebrate the 'Thirty Years of Progress' that the Ford Motor Company had accomplished since its founding. It was a free show and was held over for a second week. Over 1.1 million people came to see the free entertainment. The Detroit brass coin has the 1933 car grille with Ford script in the middle and 1903 and 1933 on one side. The obverse has the V-8 in the center and the words Thirty Years of Progress around the edge. It is approximately 1 1/4 inches in diameter.
The New York 'Thirty Years of Progress' show opened on December 9, 1933, at the Port Authority Building and ran for one week. This New York Ford Exposition brass coin is only 1 1/8 inches in diameter and has the Ford Oval with the words Thirty Years of Progress around the edge on one side and the V-8 and 1903 and 1933 on the other.