Just a note on these Bob. They are very simular to Punch Cards offered by HC EVANS & CO in their 1932 edition Secret Blue Book. Some great stuff in here Marked cards, Electro Dice, Shaved dice, all types of cheating devices and if all fails even a switch blade if the mark will not cooperate! COOL I got a reprint of the book on ebay here--> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=350029208985&ssPageName=STRK:MEWA:IT&ih=022