Hello. I see you have uploaded a very impressive range of numismatic data! I flagged a discussion on the axe d'alignement de la monnaie(P8751) because I don't think clock hours is actually a valid WD quantity, so I just wanted to see if you had any thoughts.
I was also wondering if you might have any suggestions about a good way to model coin minting. For example, if a coin was produced in the Roman empire in the reign of Augustus, what would be a good way to describe this in Wikidata? Some museum catalogues just say "ruler: Augustus" but we were wondering how that might be modelled in Wikidata.