I went out looking for native artifacts and found a couple rough points. Weird thing is that I also found an old flat button and a silver 1929 dime...without benefit of a metal detector!
It never seems to work out that way. My best dime find was a NB... with a big hole in it! Your 1872 was the best modern silver to be dug at one of our sites. Certainly not what was expected out of there either!