Today we have another of Sheldon Moldoff's "collect and save" stamps from the early days of Flash Comics. This stamp, featuring a chariot, was originally found in Flash Comics #11. I am trying to think of a time when Hawkman rode a chariot, but I can't think of one. Of course, he has been shown in a chariot as Prince Khufu in ancient Egypt, so that works, at the very least.
Image: Chariot stamp from Flash Comics #11, 1940, Sheldon Moldoff.