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.
. I hope someone will remember this the next time they get a 44-46 signal close to the surface.
Fill dirt?--I dunno!--But I could give you a lot of stories like that.--It get's wierd sometimes.
------Del