Other than the light blue flag shoulder patch shown above, do you have any evidence for this?
It reminds me of the fantasy pieces that keep showing up on eBay that look like they were made in the 1920's or 1930's. Usually these have the letters, "CS", in a block style superimposed over something else like a wreath. Think World War 1 period sweetheart jewelry with CS instead of US. Some of these have a pin construction that suggest a post-WW1 German origin. I don't know when these pieces were made, maybe as late as the Centennial? If it's one of these it's a fantasy piece and was never a part of anybody's military uniform.