This 1 euro coin from Spain, minted in 2004, has a unique error that makes it a rare find for collectors. The coin is bi-metallic with a fineness of 0.813 and a color of BN. It features the image of King Juan Carlos I and the country's coat of arms on the obverse, and a map of Europe on the reverse. Though ungraded and uncertified, this circulated coin remains a valuable addition to any collection.