Here's a coin that arrived today--glad I could buy it from a fellow collector here. Interesting history. He usurped power from Gallienus in 260 and formed the so-called Gallic Empire. He was recognised in Gaul, Germania, Britannia and Iberia until his murder in 269.
There are some nice details on this coin!
POSTUMUS Antoninianus, RIC 318, OBV: IMP C POSTVMVS P F AVG, radiate, draped & cuirassed bust right REV: PAX AVG, Pax standing left with branch & sceptre 2.3g, 21mm, minted in Cologne 268 AD.
Another interesting aspect this coin is the weight. Despite the ~21mm diameter, this coin is quite light--just 2.28 grams. The weight on these antoniani varies wildly--from just over 2 grams to past 4 gr. Perhaps both flan size and silver content weren't tightly controlled?
I think initially Postumus tried to keep the silver content of his coins high so as to compete with the coinage of Gallienus. It didn't last long and both soon debased their coinage at impressive rates.
Postumus is though noted for, 'on the whole' producing slightly better coins (Au content, size, craftsmanship) than Gallienus. I guess his position as head of a break-away region meant he had to make sure his coins were not considered 'second best'.
I have a few - one of which (first one below) actually looks 'silver' so its content must be considerably higher than the usually quoted '5%'.
21mm 2.95g
Dont seem to have dims and weight recorded - think I sent this one to jessevc1?
Quote: its content must be considerably higher than the usually quoted '5%'
Nice group--the copper alloy is more obvious on some. I have a number of debased/billon coins from 16-18 C. Europe. Even .200 Ag / .800 Cu coins tone to a dirty gray-green. If I had the right equipment, I would test the SG--just to satisfy my curiosity. I suspect my coin is debased, but perhaps the recent cleaning reduced the copper so it would look silver again?
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