Many variations exist
left coin : icsk : Vienna mint
mint official's initials and privy mark : Johann August v.Cronberg, Sigmund Klemmer
Right coin : probably NAGYBANYA MINT (Hungary)
The lettering on the coins may vary depending on the mintplace.
As you see, the arms on the eagles brest is different
Left coin : coat of arms of Vienna
right coin : in the shield on the brest :
middle : Vienna
top left : Hungaria
top right : Flanders
bottom left : Bavaria ( I think)
bottom right : eagle
coat of arms of Marie Theresia :
http://commons.wikimedia.org/wiki/F..._Empress.svgMARIA THERESIA D:G·R·IMP· HU·BO·REG
MARIA THERESIA DEO GRATIA ROMANORUM IMPERATRIX HUNGARIAE BOHEMIA REGINA
Maria Theresia, by the grace of God, Holy Roman Empress, queen of Hungaria and Bohemia
AR·AUST· DUX·BURG· COM·TYR·
ARCHIDUCISSA AUSTRIAE DUCISSA BURGUNDIAE COMITISSA TYROLIS
Archduchess of Austria, duchess of Burgundy and countess of Tyrol
The star/cross after the date as also some meaning