I have hunted a small turn of the century park for about 9 months now and have found 50+ wheat's from the 10's, 20's, barber's from 1899 to 1916 and several "V" nickels the oldest being 1896. But I have yet to dig one indian head. I dig anything above 30C with depth. The area was settled mid eighteen hundreds. Do you guys who dig Indians on a regular basis get any different reading on the CuNi's than the Bronze's??? I read one TID chart that showed the older indians at 22-23C. I swing by the park 2-3 times a week so I have hunted the small area quite a bit and still no indians....They should have still been in circulation in quantity up into the teen's anyway.....Got me scratching my head wondering why but maybe they are just not there!!!!..