Original Rare U.S. 1950s Era Experimental X51 "Universal Helmet" Liner with Intact Rigging - Size Small Category_Martini-Henry Bayonets Blade Length: 5 5/8"

Blade Length: 5 5/8"

The 146th and 148th of the 66th Field Artillery Brigade were attached as corps artillery units and participated in the battles of Château-Thierry

surrounding one of the rivets

the 104th Regiment went up the ravine by the side of the road into the village

’ and a member of the 306th Bomb Group

Original Rare U.S. 1950s Era Experimental X51 "Universal Helmet" Liner with Intact Rigging - Size Small Category_Martini-Henry Bayonets Blade Length: 5 5/8"Original Item: Only One Available. Well these are RARE!!! There isn't much information out there at all about the X51 helmets, which were developed and tested during the 1950s. They were seen as an attempt to use new technology to improve upon the M1 helmet, which had served the U. S. Military well during WWII. Also with the post war budget cuts, they looked to create a "Universal Helmet", which would be able to meet the needs of all service members.