I have recently aquired a helmet that belonged to a friends father. The authenticity is not in question. The pot is stamped 104B, front seam with brass buckle. The helmet appears to have been a medics helmet with the insignias slightly painted over. A 4th infantry insignia was added on the front. We are still searching for the liner. I have seen others sights where some have lifted the paint to restore underlying insignias, however I do not want to lose the remaining one. Leave it as is? Any suggestions? Any idea of value?