I trade in my old tesoro to upgrade to fisher!! I read the manual and i took the machine to a trashed out cellarhole from the 1750 i dugg several piece lead a and cast iron piece too and some rotted out miltary buttons and some odd stuff . I was heading back to the car i got faint beep and dugg down ten inches and moved out some rocks and pull out this soild silver broche its big it looks 1900???????I will be testing out some huge feild in the area??