Also found this 2015 5c with the missing SD
It has 3 things that set it apart from a normal reverse side(echidna side)
Starting on the left foot, we have several points with small cuds(like spurs).... hard to see with the naked eye.
Then of course we have the missing SD itself, sorta harder to discern by naked eye.
Then we have the right foot
These cuds can definitely be seen easily by the naked eye, especially when compared side by side to a normal 5c reverse side of the 5c coin
They make the foot seem like it has a larger base to the toes themselves.
So this is definitely a coin that you could hunt for out of your change from the shops with absolutely no equipment at all.
A good hunt, but lots of dirty covid coins ( ruined from being handled with sanitised hands --- I'm putting it down to)
The good coins in the hunt being coins spent after a drawer scrounging hunt for shopping money, or the empying of the money box/stash for the same reason.
Thus there [may] sometimes be one or two exceptional coins out of a few thousand.