Here are some pictures of my Australian MkII helmet with chin strap lugs dated 1942. It was given to me by my father in law who bought it from a garage sale for the princely sum of $10. It has a couple of dings, the liner is pretty beat up and came with what I think is a homemade post war chin strap but I can't complain for the price. The inner rim of the shell is marked 2251 but I cant find any other markings apart from the chin strap lugs. I bought the replacement chin strap and net online. They were sold as WW2 original with the net being Australian but I don't know enough about them to tell if they are repo - any opinions would be appreciated. The last three photos are the strap that came with it.