Thanks Tony, I recall reading your article on this ages ago but somehow this stuff all got mixed up in my mind. I've probably been watching that 'Velvet' video too much....anyway, I've just got a helmet that a chinstrap does not seem to quite fit on the posts and I wondered if it was because it originally had M91 chinscales? I think the post's are the slightly longer ones.
I'll post pics soon.....it's a nice one!