Austria BURGAU 1 Thaler 1766 Maria Theresia (1740-1780). Obverse: Crowned supported arms. Obverse Legend: M • THERESIA • D : G • R • IMP • HU • BO • REG •. Reverse: Legend in sprays. Reverse Legend: ARCHID • AUST • D • BURG • MARGGR • ... Silver. KM 16