@CuAu just trying to learn here--not trying to cast shade on you or these amazing pieces. Please bear with me.
These seem like the sort of thing that mint workers would do on their lunch hour as opposed to legitimate manufacturing errors. Based on the posts on CCF, I feel like the Canadian mint puts these out with some regularity, but less often the US mint. Do you think that these pieces are the result of similar shenanigans?
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz