Mystery 'cap' badges

[Guzzman]

I have today received three small blue-on-white embroidered WWII issue cap/hat badges - possibly for Wrens tropical hats. One of the reasons I think that is because they came with a small 'SEAC' badge embroidered in WRNS blue (see images below).

However, every picture I have seen of WWII wrens in tropical rig shows PO and CPO Wrens wearing the standard blue cap badge they would have worn in the UK. I can't find any images of badges similar to the ones I have. In fact, I have never seen any badges similar to these before. They are all quite small and I can't think of any other use for them than as cap/hat badges. There are even pin holes and traces of thread on them which suggest that at one time they were stitched to a hat of some kind.

Any ideas?

Pete