Detective Comics #400 CGC 6.5 Origin & 1st. appearance of Man-Bat

Detective Comics #400

CGC 6.5

Off-White Pages

Origin and 1st appearance of Man-Bat

1st Robin and Batgirl team-up story.

Stories by Frank Robbins and Denny O'Neil

Art by Neal Adams, Dick Giordano, Gil Kane and Vince Colletta

Cover by Vince Colletta and Neal Adams