Adventure Comics #210 from March, 1955. CGC Graded 4.0 (Very Good condition) with Off-White Pages. Beautiful copy, which wouldve graded quite a bit higher if not for a 1 horizontal tear middle left back cover edge (otherwise book has a very attractive, mid-grade appearance). Very tough, key issue with above-average page quality. Out of all the 1950s DC key issues, this book is easily one of the scarcest. 1st appearance of Krypto the Superdog! Freshly back from CGC has the newest version of the case, which looks spectacular! Terms (CGC Graded Comic Books). Feedback will automatically be left after you have left feedback for me; this tells me that you have received the item and are satisfied. Thank you for participating in my auctions and good luck! The free listing tool. The item “Adventure Comics #210 Very Nice CGC 4.0 Key 1st App. Krypto Superboy DC 1955″ is in sale since Sunday, October 02, 2016. This item is in the category “Collectibles\Comics\Golden Age (1938-55)\Superhero”. The seller is “blissard” and is located in Springfield, Virginia. This item can be shipped worldwide.