German Or American Vintage Military Helmet

Up for auction is this old metal military helmet. It is either german or american. The only markings i can find are ef6 with 176 below taht (as pictured). It looks as if part of markings are faded or rubbed away.

The helmet is in great shape and is not dented but does show a lot of use. Byuer to pay shipping and insurance. I accept personal checks, paypal and money orders. Personal checks must clear bank before item is shipped. Visit my other auctions to save on shipping when itesm are shipped together.