Not Austria but Hungary
20 KRAJCZAR
1773 IB-IV
Maria THERESIA Dei Gratia Romanorum IMPeratrice HUngariae BOhemiae REGina
PATRONA REGNI HUNGARIAE 1773 X
X: after date, during the reign of Maria Theresa, crossed staves which appear as an "X" were placed after the date denoting her reign over the Austrian Netherlands.
Mintmark G: Nagybanya mint
Mint officials IB-IV: 1772-80 Josef Brunner and Josef Vischer http://www.ngccoin.com/price-guide/world/hungary-20-krajczar-km-3814-1773-cuid-27225-duid-80972
Similar coins, but Kremnitz mint and other mint officials: http://www.beastcoins.com/World/Hungary/E0111.jpg
Non est totum quod splendet ut aurum
Rijkdom bestaat niet uit het hebben van veel bezittingen, maar in het hebben van weinig behoeften