Army Uniform Lithographs

Oct 2017
United States
Hello! While looking at early 20th century army uniforms, I came across these REALLY cool lithographs showing the armies of Germany and Austria-Hungary. They are in the same style, but I can only find them on a stock photo website. Furthermore, there are only these two countries, and not any others. I would like to get a few of these to frame around my room, but I can't seem to find their origin and if there were any other countries that the creator made. Could you help me find the origin of these lithographs and if there are any more countries? Thanks in advance!

Austria-Hungary Lithograph.jpg

Germany: Germany Lithograph.jpg