These Gold pieces have 1/4 oz of .9999 fine Gold. The obverse of the Gold Philharmonics features an image of the Great Organ of the Golden Hall in Vienna’s concert hall, the Musikverein. The reverse displays an array of instruments, including the bass, violin, harp, French horn and bassoon. Coins dated prior to 2002 are denominated as 500 schilling. Coins dated 2002 to present are denominated as 25 euros.