Need help to verify german WW2 gas masks authenticy

[Rudolf Karl]

Well I'm happy I did a search on gas masks before I posted a bunch of pictures. Seems these new, in the box deals are cheaper by the dozen.
Oh well, guess it's still cool just to have one.

[AMTG]

I love these masks, I have three, snd a forth on the way...I have three of the 37 type and the other model on the way.....these normally go for around AU$50, and there seem to be a lot coming onto the market recently