I can see the details well enough to know there's a serious problem here. You're sure those two pictures are the two sides of the same coin?
If so, then I'm sorry to say you seem to have a reproduction ancient coin. One side (top picture) has the portrait of a 4th century Roman emperor, with a name (in Latin) starting with CONSTANT... so it's Constantine the Great or one of his heirs and successors. All the coins on
this Wildwinds page for emperor Constantius II have a similar portrait.
The other side, however, is older. It's the obverse from a Judaean bronze of the time of Nero, circa 60 AD. You can see part of his name ...O KLAV KAI... (in Greek) around the central design, which is crossed shields and spears. The ones on
this page labelled "Hendin 652" are similar to this design.
Sadly, these two different sides are from two completely different coins, several centuries apart. It would be like finding a
Half Cent obverse on a
Washington quarter - an impossible combination on a genuine coin, and therefore a fantasy.
Sorry. What you've got there is most likely a "tourist copy", sold on the streets of the Middle East to tourists.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis