About the item:  

Detective Comics #497, signed by hand by Batman story writer Gerry Conway as well as by issue editor and "Batcave" (letters page) text writer Paul Levitz, and Batgirl backup story penciler Jose Delbo and inker Joe Giella. It is JSA authenticated through CGC with a grade of 9.2. Features a classic cover by Jim Aparo.  Fresh from CGC, it will be shipped with the utmost care.