I can't find this exact coin on numista.com, but our very own tdziemia here on the CCF and Numista can probably ID this fairly quickly. Definitely Austrian/Bohemia, and closest match appears to be N#105664.
Yours has the number 70 below the obverse bust and since 120 Kreuzers equal 1 Thaler, your 70 is a little more than half of a thaler.


























