Is there a simple way to ID an early M1 shell from a Vietnam era shell besides placing them side by side and looking at height? We have one now that I belive is Vietnam era, based on the chin strap, but that really is not conclusive I know however, I hope I am correct as we have it dressed up like a Vietnam Era helmet. I want to get another M1 for my son, an early era and dress it like WWII for his display. Always running across shells, at a good price but I have no idea how to ID one from the other with only one in my hand.
Any hints or tips?
Russ & Son