I am working on a Prussian M15 at the moment, which is marked size 59 1/2. The maker is Julius Jansen Stassbourg, date 1916. I was wondering if anyone has seen a half size M15 before? One last question...has any member owned or seen an original filz helme with a liner which was not dyed black? My experience suggests that sometime post 1915 we begin to see the M15's with the natural tan liners but I have never seen a felt helmet which did not have a black coloured liner. Brian