@Danmanuk, could you please post a pic of the back. I've taken liberty of cropping, rotating, and enhancing your first pic. Also, I'll ask the mods to move this thread to the ancients and medievals section of CCF so that we can get some additional eyes on it (not that @sap is wrong).
"The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz