Austria. Maria Theresa (1740-1780). AR Taler, dated 1780 SF. 28 g. 41 mm. VF. Since the death of Maria Theresa in 1780, the coin has always been dated 1780. After introducing the decimal system (1 Gulden = 100 Kreuzer) in 1858, it lost its status as a currency in Austria. The 'Maria Theresa Thaler' continues to be produced by the Austrian Mint in Vienna.