1958 Mexico Un Peso Silver Coin (Morelos)

This item is a 1958 Mexican Un Peso silver coin, commonly referred to as the 'Morelos' Peso due to the portrait of Jose Maria Morelos on the obverse. The visible side in the image shows the Mexican national coat of arms—an eagle perched on a cactus devouring a snake—surrounded by the text 'ESTADOS UNIDOS MEXICANOS' and 'UN PESO 1958'. Physically, these coins are composed of a silver alloy, specifically 0.100 (10%) fineness, which was a significantly lower silver content than previous eras. The coin appears to be in circulated condition with visible surface wear, dulling of the original luster, and significant dark grey-to-black toning or tarnish typical of low-grade silver. It is housed in a contemporary clear plastic sleeve with a yellow paper insert that reads 'OLD MEXICAN SILVER DOLLAR Minted from Real Silver SCARCE'. This marketing insert is likely from a third-party distributor or souvenir seller rather than a formal numismatic grading service. Despite the insert's claim of being 'scarce', these coins were minted in high volumes during the late 1950s. The craftsmanship reflects mid-20th-century industrial minting techniques, with a reeded edge and machine-struck details that show flattening on the higher points of the eagle design due to use.