Austrian Gold Philharmonic. First minted in 1989, the Austrian Vienna Gold Philharmonic has a face-value of €100 and is one of the top-selling gold bullion coins in the world. The Vienna Gold Philharmonic is also available in fractional amounts of 1/2 oz. (€50 face-value), 1/4 oz. (€25 face-value), 1/10 oz. (€10 face-value), and 1/25 oz. (€4 face-value).