4 Euros Vienna Philharmonic

Austria introduced the platinum Philharmonic series in 2016, making it one of the few sovereign mints to issue platinum bullion coins in fractional sizes at that weight. The 1/25 oz denomination exists primarily to provide a lower entry point into platinum bullion, a metal that spent much of the 2017–2023 window trading at a discount to gold — an unusual inversion that historically corrects, and that drove renewed institutional interest in the format during this period.