House ad for Detective Comics #500 (March 1981);
printed in Detective Comics #499 (February 1981)
Cover of Detective Comics #500 (March 1981); pencils and inks by Dick Giordano,; Joe Kubert, Carmine Infantino, Walt Simonson,Tom Yeates, Jose Luis Garcia-Lopez, and Bob Smith
(Click picture to detectivize)
Here's 'Tec 500's text page, featuring a look at the jam cover in progress!