50's Infantry School M1 Liner Question

[338thRCT]

Found this liner this week and at first glance thought it was WW2 issue with khaki webbing, sweatband, and neck strap. Remnants of chinstrap. Pictures of the interior came out a bit lighter than it actually is. Also has a sheen to it's finish. Clincher is that there is no mfg/ stamp in the crown, nor any other marking that shows who made it. Grommet hole in front looks like it was drilled by previous owner as there is no metal grommet in the hole. Chevron on front is gold and blue 1950's type. I know liner manufacturers used leftover WW2 webbing etc. but this one has me wondering. Also can see some sort of reflective white beneath the dark paint on exterior next to Inf School Insignia.