Got out for a little bit Sunday night and decided to hit a old spot for a while after about a half hour I got a pretty good signal dug a plug pulled out a nail at about 6" put the plug back in thinking wow that nail sounded good rescanned the hole signal was still there dug down another 2" so I'm at about 8" and the probe went off one more little scoop and it was staring at me a 1900 Barber dime with four different areas with rust stains. I have hunted with other machines for 12 years and have never pulled out rust stained coins and In less than a month with the E-Trac I have found two. Thanks for looking Jer