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I have but unless I'm blind/an eejit (neither option being ruled out ) there's nothing that instantly screams I'm an early war hat? hoping very much to be proven wrong
If you are going for historically correct, ditch the helmets. During the war, there weren't any helmets enough for all the soldiers. So for example when you see ww2 soviet pictures with soldiers with all helmets, that's a 50's remake for propaganda.