International back for Voigtländer Avus 9x12

There are lots of different folding cameras for 9x12 glass plates from the beginning of the 20th century.
Popular examples are the Voigtländer Avus or Bergheil cameras as well as Ernemann, Zeiss ICA, Steinheil, but there are lots of different brands and builds which are quite similar.
In rare cases you will have a clean and working camera, an intact ground glass and the right metal cassettes and the often missing (and thus quite rare) inlays for sheet film in the 9x12cm format.

So you have