I have had to learn the hard way about this one. However, one can share their experience, and hopefully you won't get taken! McCoy/Nelson McCoy has never produced Mammy or Cat string holders in all their years of production. I see many of them on Ebay, touting words like "old" "usual wear"....etc. The best thing to do is research, buy a book on what you are collecting, or join one of the many forums they have here on Ebay. This way you will be sure to get "The Real McCoy".... :)