1755 Jm Peru 8 Silver Reales - Good Or Bad?

Although I have spent many years collecting other rare historical items, I am new to collecting coins. My experience in other arenas has taught me to look for certain tell tail signs of modern (fake) manufacture. I suppose I also enjoy the constant learning that is a part of these hobbies.

Anyway, recently I purchased a 1755 LM Peru 8 Silver Reales coin. After getting it in hand, there are a couple of things that cause me pause. I am wondering if some of you see the same concerns.

When comparing my coin to the 1758 example on NGC's website (https://www.NGCcoin.com/price-guide...id-1510435), I noted the following on my coin:
* The hook on the Q seems off/to flat
* The base of the fleurs-de-lis seems to flat/under defined
* The ribbing around the outer ring of the coin (not sure what to call it) does not appear to have a break/meshing point from manufacture
* The M in the LM may be off (missing the well defined line through the middle right)

I am not sure if these variances could be the result of a different die. Any help or insight you might be able to offer would be much appreciate.

Thanks,
The new guy