I went back to the park where I found the 1870 Shield Nickel last Monday and had a great 4 hour hunt!
Found a very nice 1909 Barber dime and two more Shield nickels! Both are 1868. I have only found 4 of these prior to last week and now they are popping up. I think when I go back I will start going after any deep signal because it is obvious that the area was used in the 1860's or so until present so who knows what other goodies are hiding there.
I also found a pinfire cartridge. I think that these are 1850's or so?
Thanks for looking!