I've had my AT Pro one month and have found a few rings, lots of clad including a lot of 1965 quarters and dimes but no silver. My research had me leaning towards a particular area which last time I found a medallion from a saw made in 1877. But as of today I had not found any silver till tonite. I returned to this area tonight and pulled a 1903 Barber dime. Depth read 10 inches. I was running on Pro Zero with the sensitivity maxed. So glad to finally hit some silver. The dime as an X scratched on both sides but hey...it's my first silver! I'll take it.