Detective Comics Vol.1 #404
When murder breaks out on a World War I movie set devoted to the story of Rittmeister Hans Von Hammer, the Enemy Ace, Batman investigates and finds a modern-day "Von Hammer" devoted to keeping the originals memory untarnished in his own eyes.
Printed: Oct 1970
Writers: Denny O'Neil
Art: Neal Adams and Dick Giordano
Cover: Neal Adams