I picked this up in a trade from Al Barrows many years ago. It is a front seam swivel bale shell. The heat stamp is not legible. It came with a Westinghouse liner, but I do not know if it was always with the shell.The insignia was under the repaint and liberated before I acquired it. The rondel is a textbook example of the helmet insignia found on helmets worn by members on the 94th ID during WWII. Hope you like it. Jim G.