Hi Gentlemans !
If I may…
On the picture is a stamp of manufacturer on the right side and the stamp of "noble" metal on the left.
Since the law from first January 1867 must have all the precious metals in Austro-Hungary markes -"stamp" , even those intended for gifts. An exception was only thousand products intended for export, but were chased by the IOM''FR''is frei, zollfrei exempt from customs duties.
The Act was amended on 1 April 1872, when the addition of a "stamp" to pure material gives a "stamp" of the manufacturer. (The exception is the case of Vienna as''A''in the ring, without the "stamp" of noble - precious metal )
And engravers of medals for bravery:
Johann Nepomuk Wirt (1753-1810), Johann W. Harnisch (1785-1826), Johann Josef Daniel Boehm (1794-1865), Konrad Lange (1806-1856), Friedrich Leisek (1839-1914), Josef Tautenhayn (1837-1911) in Heinrich Kautsch (1859-1943)
Best regards, Dejan