Firestone helmet liner id

[Geertse]

Hello,
I need some help with dating this Firestone helmet liner. Not in the best condition.
The A washers are brass but heavely corroded.
Is this wartime or post war?
Greetings,
Geert

[Neil Hever]

Is that an air vent up front? Usually a sign of WWII. NH

[Geertse]

Yes an air vent

[nickman983]

Firestone did not make liners after WWII, the only manufacturers after WWII are Micarta (Westinghouse) and Capac.

The liner itself is WWII manufactured but I would wager a guess that it was post war used based on the repaint.

[Neil Hever]

Agree with Nickman. NH

[Ethan]

I think its early-ish war production because of the A-washers not being blackened.

[Geertse]

Thxs guys for all the info!!!
Greetings,
Geert

[greatwhite]

Ww2 for sure, looks like it seen some action in its time too.

[gel65]

Not an air vent, It's used for insignia. Usually rank insignia but also branch insignia was used. Liner is ww2 production

[Neil Hever]

^Thanks for that correction. It is sometimes called an air vent incorrectly like I just did! NH