Gary Cooper's 1938 Cadillac Sixteen Convertible Coupe

A 1938 Cadillac Sixteen Convertible Coupe believe to have been owned by Hollywood legend Gary Cooper will cross the block at the RM Auctions event in Boca Raton, Florida on February 24-25. Although Cooper's ownership has never been confirmed, the classic American luxury car has long been associated with the star and has a pre-sale estimate of $400,000-$600,000. (RM Auctions)

Restored to show-quality condition in recent years, the ultra-rare Cadillac is one of only 10 convertible coupes produced. (RM Auctions)

The car has only 2,300 miles on its odometer, and its 185 hp 431 cubic-inch V16 engine has been fully rebuilt. (RM Auctions)