UBB.threads Forums Uniform & Accessories Helmet Forum M40 Combat helmet - what do you think ?

Raymond,

Nickel plated brass rivets were made up to and including 1940.
These will be found in some transitional M40,s untill existing stocks were exhausted and steel became the predominant rivet material.

I personally have an NS M40 with a 1941 werner zahn aluminium liner band and 1940 dated nickel plated brass rivets.This is a very late transitional as its batch number is in the 8000,s.