Pretty brave purchase in my opinion. Only reason I say that, when I reenacted years ago, it was very common for craftsmen to make M43 hats from original Italian wool. Not saying this isn't real, just my opinion that you have to be brave to buy a tailor made 3R item. I saw original rat holed zelts that were turned into all sorts of helmet covers, soft hats, etc. Original greatcoats used to make M43's (lining and all). Just because of that I wouldn't do it, but I trust no cloth anything from that era, so perhaps you had a specialist look it over - in that case I guess it's possible, as there are people that can spot the repros of factory made stuff. Those repros looked original after a few years "in the field" - keep in mind that they weren't meant to be fakes, just high end reproductions.