I have 20 dresden plates that my grandmother made and here is the story.
At the age of 5 my moms family lived in Duluth ,MN. This was about 1935. My mom would walk down to the corner to a uniform factory. She collected scrapes that were left over from making the uniforms. I thought all uniforms at that time were solid colored but these are the 30's prints. My grandma made them into the plates just like the ones in your photo. The quilt never got finished but some how my mom ended up with all the plates. I remember playing with them as a child, I would use them for skirts for my dolls. In the mid 80's I took quilt lessons and started quilting. I had some quilt friend help me sew 12 plates on to squares. And again their the quilt sat until 2008 when I sewed the top together and had it machine quilted. I gave the quilt 2 names, one is "Passing Grandmother's Plates." The other is "The 70 year Quilt". Just looking at the fabric of yours I would say they were from the 30's. If I figure out how to post photos I'll put up a picture but don't hold your breath.