Third time Ive been out this year. First two times all i found was a corroded Indian head penny and the date wasn't visible. I was hunting in the woods in an area that I have hunted hard . I was using the Vaquero with stock coil in all metal mode , listening for any signal at all. When I got a signal i'd switch to disc and if it was repeatable at minimum disc I dug it. There was a soft signal in all metal and it sounded soft in disc. As i thumbed it up , it got quieter. Silver dimes do that a lot on my machine and thats what i was thinking. Four to five inches down comes a 1944 mercury. a few minutes later I got a signal that sounded like a nickle.Four to five inches down comes a coin the same diameter as a nickle but much thinner. Its so corroded that there is no detail on it. I dont know what it is. Its about the same thickness as a dime . Very strange , I thought maybe a two cent piece .