I don't know if the link above killed the thread, or just lack of interest, but I'd like to try and kick-start this thread again to see if we get any fresh response on it. DC probably had the best publicity dept at the time and produced some little gems. Marvel/Atlas didn't seem to get into house ad until the mid Silver Age, and other publishers could be hit and miss in self promotion, but like Silver says in the original post, they did drive us crazy for more, and they were a handy reference too!
This one interested me because it came at the cusp of DC raising their prices from 10 cents to 12, so the price is left blank.
Meanwhile, over at Marvel in 1962....