This is a concho made from a Mexican 5-peso coin. It is not a silver coin, but a cupro-nickel coin. The design features the eagle with a snake from the national emblem. It uses a circulated coin. The photos are reused. The year may vary. Chicago screw attachment on the back, actual size is approximately 26mm. The screw is M4 and 5mm long. An 8mm screw is also included for thick leather. Compatible with large jumper snaps. Thank you.