The product is a cleaned Byzantine coin from the rule of Manuel I Comnenus, specifically a Billon Aspron Trachy minted between 1143-1180 in Constantinople. This ancient coin hails from Greece and is uncertified, adding to its historical authenticity and value. It is a piece of Byzantine history, showcasing the craftsmanship and artistry of the era, making it a desirable item for collectors and history enthusiasts alike.