Easter afternoon my father-in-law and I decided to try out our new 15" coil on his family homes yard that was built around 1860. We had brushed through the yard prior with our 11" coil finding a few treasures. Nothing like this. To my surprise my first signal dug was this 1721 Mexico mint silver holed half real coin. This is very rare in Northern Utah as the first settlement was in the mid 1850s.