Austrian Fiscal Revenue Stamp

Please help with identification. From what little I can see doing an online search this is a Fiscal stamp from Austria, Fourth issue. Any information you can provide (catalog number, value, etc) will be greatly appreciated.

Thank you!



*** Moved by Staff to a more appropriate forum. ***

This is a documentary tax stamp of Austria. The 1870 date identifies it as fourth issue. Your 50 kr. stamp (Erler/Hagn #84) is not rare. There is a variety with an open (at bottom, I believe) "0" of 50 which commands a premium.

The fourth series was the last one of stamps of this design (1854-70). The following series is the "kaiser/emperor head" design (1875).

Information here is from Catalog of the Adhesive Revenue Stamps of Austria by Martin Erler and Dr. Helmut Hagn

Thank you very much!

#100 in Forbin catalogue,with minimal value.