Prison Post Card

Going thru my old post cards, I found this one from the Ohio State Penitentiary Annex which contained the famous "Bankers Row". No date on it but I saw where domestic postage was one cent. This is really the first post card I had ever seen with a prison on it. Reading the back, it appears that there was a series of these given away by The Columbus Dispatch Newspaper for clipping a coupon. There was series of these, but this is the only one I have. I believe the date to be around 1910-1920. It looks like they were locking bankers up back then, just like today. I guess some things never change ! Thanks for looking.