Family PLATE

Hello:
  As you can see, I am typing additional information regarding my family. I found a couple of pictures of
  Bertha Kruger geb. Plate, one was taken by Atelier Koch, in Quedlindburg, do not know which year this picture was taken. The back of the picture states something like "the original disk remains in storage for for back orders"...........While I understand that Quedlinburg remains as it was in the late 1800s, I would imagine that such studio is no longer in existance..........will try to check it.
   
  The other picture of Berthe Kruger geb. Plate was taken in:
  A Wertheim, Berlin.
  Leipziger Strasse
   
  Similar to the previous picture, there is no date on this picture.
  Bertha Kruger used to send letter to my grandfather, however such letters have benn lost.
   
  Any help or suggestions?
   
  Thanks
   
  Otto Plate