Detective Comics #468-Fine (5.5 – 7) First Use of The Iconic 'Bullet' DC Logo On A Detective Comics

"Battle of the Thinking Machines," The Calculator has immunized himself to six members of the Justice Leagues attempts to capture him, but Batman resolves to give it another try. Hostess Twinkies ad starring Aquaman and Aqualad, pencils by Curt Swan, inks by Vince Colletta.
Message from publisher Jenette Kahn, art by Neal Adams.

(NOTES: First use of the iconic 'bullet' DC logo on a Detective Comics cover;
1st cover appearance of the Calculator)