The picture is undated. The signature at the lower right edge of the picture is difficult to read, it could be identified as D. Meritt or Marill.
On the reverse there is a red stamp of the Bundesdenkmalamt Wien (Federal Monuments Office Vienna) as well as in blue writing "A26433" and below it "1274".
Another provenance notice, also in blue lettering in the upper left corner, is not legible.
