Hi,
The Austrian tax mark used between 1810 and 1824 in connection with wars against Napoleon.Austria had financial problems (excess of paper money, lack of silver money). Kaiser Franz II ordered "repunzierung" (re-strike) for every silver item owned by Austrian citizens who had to pay 12 Kreutzer for 1 loth silver.
As well as "VR" (Vorrat) mark,for full info see here:
http://www.925-1000.com/forum/viewtopic.php?t=25867
Regards