The 1852 trime was deep, it wasn't in the first plug...I don't know exactly how deep as it was in the piles of dirt I took out of the hole.
It was found with the D2, Deep HC, 9in coil. I'm guessing my Nox would have found it with the 11in coil but I may not have dug it, as it would have sounded like an angel whispering...it's sweet sounding but sometimes doesn't jar your mind. The D2 YELLS at you. There is no mistaking tones on this thing. I need someone yelling at me, DIG DUMMY!