Thanks! It indeed looks like Wurttemberg, Swabia and coat of arms of Hohenstaufen House. But Württemberg is not under Habsburg rule...This symbol is shown on some of Charles VI and Maria Theresia Coinage.
Cool! Thank you! Carinthia was under Habsburg rule since 1526. This make more sense. But does it happens that on coins, only part of the coat of arms can stand for the whole region. I mean carinthia's Wappen is three lions and three stripes. But only three lions are shown on the reverse of theresia's coin. Here is a reverse of Hogmouth Thaler. Carinthia and Württemberg's Wappen are on this coin. They all include whole coat of arms. And another question... why wurttemberg's Wappen is on this Thaler? Just because it's part of Holy Roman Empires? Thanks a lot for the reply!