I have a coin that was sold advertised as the Roman Bronze Centenionalis Constantine Coin.... It just arrived and it looks like it is in too good of shape to be that old. Is it possible they cleaned it and then coated it? The printing on the coin looks as good as some American coins... They claim its authentic enough to include a authenticity note. I'd show a better picture but all I have is a web cam and my phone. Roman Coin Side A by MachDJ7O posted Aug 1, 2023 at 1:22 PM Roman Coin Side B by MachDJ7O posted Aug 1, 2023 at 1:22 PM
It’s always hard to say from photos but it appears to be authentic. Roman coins in this type of shape from this period are actually fairly common and relatively inexpensive. A nice coin, a Constantine I, with a reverse known as a campgate! Looks like it was minted in Thessalonica (SMTSA).
I agree, it looks authentic from the photos. Late Roman Bronzes (LRBs) are typically found in pretty decent condition so the condition of your coin is not unusual. Nice example!
I edited and enlarged your images and I see nothing wrong with the coin. I don't have the time at the moment, but with these images it would not take long to fully attribute.
Ancient coins are sometimes coated with various substances to "preserve" them. These include RenWax and some lacquers.
