I showed it to another collector and he says this helmet was probably used in the l ate 1950s or early in Vietnam and that's most likely when the LT bar was painted on it. Capac Liner is 1 955-58 manufacture , bought from same place but may not be original to the helmet. The item "Vietnam or Korean War Us Army M1 Helmet Painted LT Bar Insignia Original" is in sale since Tuesday, November 14, 2017.
This item is in the category "Collectibles\Militaria\Vietnam (1961-75)\Original Period Items\Hats & Helmets". The seller is "subsystem4" and is located in Pelham, New Hampshire.This item can be shipped to United States.