I doubt that the liner is original to the helmet .
Not standard liner however I do not know from what helmet the liner comes from.
Thanks for educating me a bit further Dom, I have not come across this type of liner before in a 39. Every day a learning day
Looks like a nice original helmet shell to me. Whilst the Ssh39 has a different liner from the more common Ssh40, it dosnt look like that. I would of thought post war liner, and possibly from one of the other Warsaw pact countries.