Local contractor gave me permission to do his property that he was remodeling the 100 year old house, went off pretty good. Sen 85 Disc 15, 1 tone BP process. 5 Wheaties, 1906 IH, US collar brass. All between 4" to 6 " deep. 2 Barber dimes 1901, 1906-D, 2 Merc's 1917, and 1928 and a 52 rosie, Great Day........