As it says "Beilage" it was a kind of supplement to what was probably a fashion / ladie's magazine. I am in Switzerland, but have never yet come across from such a magazine from the 19th century - I just have a few early 20th century ones. Victoria might have been a popular name for such a thing in Germany then - Princess Victoria, the daughter of Queen Victoria of Great Britain had married the Prussian crown prince in 1858. Off the top of my head one museum that I could think of is the Wien Museum in Vienna, as they also have a fashion collection. A look search in their online collection didn't bring up anything though. In Germany, I'm not sure which museum might hold things like this.