Back with another basic question for my own curiosity. Is there a good source that details the changes to fineness of Roman denarii over the course of time? I've seen rough figures thrown around but there must be a more definitive, authoritative compilation somewhere that narrows it down.
I just googled: silver purity roman This was on page 1: https://www.ngccoin.com/news/article/6842/NGC-ancient-coins/
