Happy birthday, Superman!

75 years ago today the Man of Steel debuted in the pages of Action Comics #1 (cover dated June 1938). Since then his daring deeds of good not only have changed the world (and the world of comic books) but also have inspired all of us to make a difference.

USPS06STA014HThis stamp is one of two Superman stamps released in 2006. When did he make his first U.S. postage stamp appearance?