Not quite the right thread, but I saw some interesting badges on a "colourised" film on TV of work going on at Bletchley Park during WW2 (possibly filmed in a less secret location) Anyway a couple of the RAF chaps, one a sergeant and the other a corporal were wearing four war service chevrons on their lower sleeves. We had a discussion on these on another thread which I cant find, and the general opinion (confirmed by Danny) was that although they were authorised they were often not issued and seldom seen on uniform. Interesting to see two NCOs in the same room wearing them.
To add to the interest another corporal was wearing "Mauritius" shoulder titles on his BD, which must have been pretty scarce. I had a collection of these overseas RAF titles pass though my hands many years ago, and one which stuck in my mind was "Argentina"!.