Weird duck bill helmet

[RH1941]

Hi guys I picked this up for $15 . I can't find any stamped marks on the inside and the vents are throwing me off. Anybody ever seen anything like it . Thanks for looking . Gary

[Bavarian]

Hello
This is a M27 so called himmler helmet
They normally never stamped
This helmets were produced in the 20s for civil services like Firedepartment and for the private purchase
Other members know more about it
Here is mine with added repro decals and ersatzliner
Best regards
Bavarian

[RH1941]

Bavarian thank you for identifying my helmet .