This 1 euro coin from Spain, minted in 1999, is a rare find due to its error. With a composition of bi-metallic materials and a fineness of 0.813, this coin has circulated, adding to its uniqueness. The obverse features a portrait of King Juan Carlos I and the reverse showcases the Royal Seal of Spain. This coin, with KM number km1046, is ungraded and uncertified, making it a must-have for any coin collector.