Almost seems as this ETrac is sensitive to mass, like it has been designed to "expect" certain ferr/cond readings to be a certain signal width and if it's different and falls in coin range it gives a 1-49/ 1-50 ID on some larger coins. From that, one would assume you could predict a coins position from the ID it gave. I can't wait to dig up a 1-50 signal as that would be outrageous, if that were true with a in the ground target.