Thanks for all the replies! Just measured it with a metal tape measure which doesnt follow the helmet contours very well so not that accurate a measurement, but it definitely measures under 18 inches. So that fits with it being 1960's-70's. This is the camo cover that was on the helmet, also same time frame?
[/COLOR][CENTER][COLOR=#ff0000][SIZE=3]URGENTLY LOOKING FOR: 1982 era Argentine military issue goggles. Fravida 109, and "Sanbuee" French lens type
[/SIZE]Have a look at my 20+ (so far, work in progress) albums for lots of M1's, rare liners and other stuff, including WW2British helmets, Falklands battlefield pickup helmets and let me know what you think!