im trying to locate an item that I know exists. I fear that it may have been specifically made for one person though as I cannot find it in any of the online magic shops. It is in essence a wrist watch metal detector. I happen to know that there are a couple in existence in use by mentalists to do the "which hand is the coin in" trick. Any ideas at all where and IF I could get one? I'd even take on trying to make one I just don't have a clue how so if any of you know that answer too it would be appreciated.