need to tip it up and photograph it not lying flat on your stage and show the other devices as well as overall of both sides
I get the impression that it is the end of the 6 caught in mid stroke. I will generate more pics for reference. If you move the extra piece left, it matches the 6? Or would there be extra material on the end of the six if the die broke?
That is damage to the field. It isn't part of the six. Your first pic shows another gouge in the field, the displaced material has been almost worn flat.
The images have an appearance of being a photograph of a photograph. Note when looking on the attribution sites many of the photographs are taken from angles other than straight overhead. This is a prime example of a coin that should also be inspected in the same manner as well as photographed. Typically I use Rodico, (modelling clay or Plasticine easy enough to get anywhere works fine) but, only on coins that aren't filthy. Playdough is acidic so if you use it, the coin exposed to it needs to be neutralized quickly in baking soda. Masking tape and a stack of nickels. Fidgety but will work. Most likely this is indeed PMD and what you are seeing straight overhead is something has hit it, probably another coin or maybe a key, and it's knife edge cleanly sliced the top of the 6 and deposited it where it now rests, and as it rests. Try it and don't limit your inspections to the coin lying flat on your stage. You'll miss some details that way.
Nolan, I recall you were getting a scope and am pretty sure you did and it is working very well, better than most for sure. Did you tell me which one you got and how about a pic of it and specs?