I don't have one but looking forward to see what is posted. It is an interesting subject because privy marks were originally a small mark or differentiation in the design of a coin for the purpose of identifying the mint, moneyer, some other aspect of the coin's origin, or to prevent counterfeits. One of the first instances of a privy mark used as a counterfeit measure was during the 17th century in a plan proposed by Sir Edward Ford to mint farthings, three farthings and a halfpence. In modern times, the privy mark is used as a design and marketing feature to commemorate a special event or signify that the coin is part of a set. It is still sometimes used to signify the location or origin of where the coin was minted.
https://en.numista.com/catalogue/pieces4359.html Privy marks at sides of date. Anchor for Albert-Désiré Barre. Bee for Paris mint 1860-1879
Some of the earliest privy marks are on Greco-Roman coinage. Privy marks are known as “control marks” in the context of ancient numismatics. On my silver denarius, a privy/control mark is seen on the obverse behind the goddess’s bust. Another privy/control mark is seen on the reverse (a bird). L. Roscius Fabatus AR Serrate Denarius. Rome, 64 BC. Head of Juno Sospita right, wearing goat-skin headdress; control mark behind, L•ROSCI below Female standing right facing serpent; control symbol 106 in left field, FABATI in exergue.
Thanks for showing us your nice coins. I have so many with privy marks, I think I'll just look at yours. Again, Thank you.