I can try and help here. These are 95% copper coins. Yours appear to be circulated and with being from 140 - 125 years old,
they would not naturally look like this. Also note the dark areas in all the recesses of your coins. That's the natural color of the
very old patina that should cover the entire coin. Someone errantly cleaned these coins removing most of the patina. That's just obvious.
I only have one 1903
Indian Head cent and it is completely dark brown.