Here is a close-up of my 1858 8/5 (CCCS AU55), for comparison purposes.
With all the damage on your coin aside, the "horns" on top of the 8 in your 1870, are in the wrong place, for there to be an underlying 5. Also the top loop of the 8 in your 1870 is not partially filled like the 8/5 in the 1858.

With all the damage on your coin aside, the "horns" on top of the 8 in your 1870, are in the wrong place, for there to be an underlying 5. Also the top loop of the 8 in your 1870 is not partially filled like the 8/5 in the 1858.


























