The following images are courtesy of the Auction House-

The following information was kindly sent to me by Mr. Peter Neij of Småland, Sweden.

Franz Spurny- Büchsenmacher, took over Josef Heinige’s establishment in 1902. For a while he traded under the name Josef Heinige’s Nachfolger Franz Spurny. 

The Franz Spurny advertisement from 1904

By 1905 he had ditched the Nachfolger  from the ad and from then on it was simply Franz Spurny-Büchsenmacher. In 1913 he became / was appointed K. K. Handelsgerichtliche beeideter Schätzmeister und Sachverständiger. In 1919 he seems to have been out of business but was still Handelsgerichtlige beeideter Schätzmeister und Sachverständiger, the only differance now (as there was no longer the entity- Austria-Hungary) being the lack of imperial and royal in front of the title.

On April 20, 1921 he entered into the business Karl Barth Co., Wien. (see the Advertisement below from the Vienna Commercial Register).

By 1924 there was no longer a Franz Spurny- Gunsmith in Vienna and by 1925 the Co. had disappeared from the Karl Barth business.