Jim,
If any of the Harrah's cards in your collection have my name and number 157, there is a good chance it was not obtained in AC. Yes, the 157 indicates AC butI have had reissues at every Harrah's in the US except those in CA. I would say 85% of the cards with my name / number I traded came from other than the AC location. We traded some at the convention and others times. I know you got some Game of Life cards from me. I never was able to get a Game of Life in AC. My Game of life cards were from Metropolis with a 157 number.
Bottom line, do not fool yourself into thinking you have a location based on the first 3 digits. Unless of course you got the card there yourself.
Paul