Set of 4 unsigned landscape paintings shops from Germany,German Landscape Paintings,Oil or Acrylic Painting,Set of 4 Paintings

I purchased these paintings from a man who said his Mother got them on a trip to Germany. They are unsigned and appear to be reproductions for export. When they are tapped, it sounds like they were painted on metal, tin. or hard plastic.Also the frames sound the same. I was told shops they were oil paintings. Painted by hand. The colors are complimentary in all 4 and very pleasant. I have included a picture of the printed tag that came off the back of one of them.

size in frame 11 3/4" x 10 1/8"

The condition is excellent. No damage

If you havase questions, please message me,thanks