Found these helmets in a shed.

[timnmgn]

I don't know much about militaria, but these helmets appear to be US helmets:

 

The first (green helmet) is made out of some sort of plastic and only has 1 marking : SW 73  

The second helmet has no markings except an N with a circle around it.

 

I'm just curious of anybody know what types of helmets these are, and when they where produced.

 

Thanks,

Tim.

[Blacksmith]

Hi Tim, thanks for sharing the pics.  These are actually liners for helmets, versus helmets proper.

 

First glance, the plastic liner looks like a Euro-clone, possibly Israeli.

 

The second one looks like a WWII US example.

 

Nice finds.

[earlymb]

I think both are Dutch, 'SW' = Schuberth.