One hole is for a single post award and the lower was intended for a 2 post award as evidence by the staining and imprint inside on the lining it appears this officer may have worn a wound badge with dual screw post or another award with a dual screw post that also had an oval back plate. I have the advantage of knowing what it looks like inside the lining.
I don’t have such a badge collection, so why decided on a screw back FA.