For sale here is US Post WW2 Korean War M1 Helmet & Liner.  The shell is a rear seam swivel bale.  The shell appears to have original paint.  The paint shows wear and some loss.  The chin straps are riveted to the bales.  The shell appears to be heat stamped 1205C.  The Westinghouse liner has thick shiny overpaint over unit markings on the sides.  The liner shows a fair amount of paint loss.  This is a WW2 era Liner.  The webbing is pretty well roached with some rips and tears.  The maker mark is faint, but i believe it is a Westinghouse.  The nape and chinstrap are missing.  The sweatband is a later replacement with an illegible date.  A decent set for parts or refurbishment.