As we're revisting that thread, whilst reading through I made an observation that people were referring to elastic inside the kilts on the military box pleat versions. My father has an unissued A&SH kilt from the 50's and there is definitely no elastic inside them. Based on that and also sure that I heard something from ex serving family members but I think (at least originally) the elastic was not applied by the manufacturers but added by the men 5hemselves post issue if they chose. I stand to be corrected though...