Original U.S. WWII M1 Helmet Liner by MSA with 131st Armored Tank Battalion Insignia colts The barrel has been demilled

The barrel has been demilled with a hard steel pin welded through the chamber from top to bottom

Every girl pulling for victory - Victory Girls United War Work Campaign / E

such as a built-in compartment for spare parts

New Made but constructed

Original U.S. WWII M1 Helmet Liner by MSA with 131st Armored Tank Battalion Insignia colts The barrel has been demilledOriginal Item: Only One Available. This is a very nice example of a genuine WWII "High Pressure" helmet liner by Mine Safety Appliances (MSA). The liner looks like it was then reissued for training use, possibly post war. The liner is marked on both sides with the unit insignia of the U. S. Army 131st Armored Tank Battalion, which is the standard armored unit triangle, with 131 at the top. Helmet liners such as these were often worn during training,