Austria Holy Roman Empire (800/962 - 1806) Sigismund, Archduke of Austria (1439-1490) 16 Ducats 1486/1953 Vienna , dually dated and individually numbered, this is a massive gold reproduction of the iconic first Taler struck in Klippe format with the serial number at the base, in this case number 5. official strike of the Vienna mint. Au. 55.88 g. NGC MS 66