I'm not too familiar with paratrooper issue M1s, could anyone shed any light on the following:
What colors were the chinstraps on the helmet shell (M1-C is the proper term I think?), did the colors vary by era?
Were paratrooper helmets common during the Vietnam war? Which units used them?
And lastly, what chin cups for the liners would have been used during the Vietnam war?
Any era photos or reference websites would be greatly appreciated!