Here’s one that may require sleuthing. I haven’t figured it out to my satisfaction. Photo is of a Thud WSO circa 1971 (Buff combat pilot for 60 missions before moving to the fast guys) and out of Koran/Thakli. He was running WW missions at the time. Non-standard “bandoliers” on hips shoulders. The rounds are NOT .38s for the typical revolver, nor .45s for those that used them. .556 would be period relevant but there were no survival rifles carried in WW cockpits or similar. Same for .30 cal which is snub-nosed like these may appear to be but also don't appear (even in cut down/foldable versions that were present at the time) to have been carried in cockpits. So that leaves me with “he just put a bunch of non useful rounds in the bandolier for a picture” or, given their tapered yet still stubby appearance, were they perhaps 7.62 which might make sense from a survival POV. I’m not sold definitively on any of these so far.