Sorry to resurrect this old thread, but I have information about the hallmark. As mentioned by @hon in a recent thread, it is the Bavarian Mint, "Bayerisches Münzkontor".
Here is a link to the numista page on them:
https://de.numista.com/catalogue/mint.php?id=4907I didn't find this specific coin for sale on their website, but note that it seems very much on brand for them.
Finally, here is a link to the other CCF thread:
https://goccf.com/t/452776#4436236
"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