Well, it is definately original, but it is an original Hungarian M50, not a Russian or USSR helmet at all. The leather strap and cloth-covered pads are a sure sign. Good helmet. NB these shells are not, in my observation, identical to the Russian Ssh40 shells. So, obviously following the same pattern as the Sssh39/40, for political reasons, but like the Polish wz50 just different enough to have a national flavour.