I found a 1941 Mercury Dime at 2". I have dug many deep coins in the 8" - 10" range just never found a shallow one in this park where modern clad can sometimes be 6" - 7" deep. I usually walk right over shallow coin signals as I hate digging clad. The Etrac is so distinctive on the sound it makes for silver that I could not in good conscience walk over this shallow target that sounded like silver and bang the sound is right even though the numbers are pretty much the same for a clad and silver dime.