Original U.S. Vietnam War Era Operation Igloo White Seismic Sensor ADSID III Napoleonic 000 helmets were painted horizon

000 helmets were painted horizon blue and were fitted with the French RF (République française) frontal insignia

To combat frozen pads in your helmet

with a nice pin catch on top

The markings on the receiver are still mostly legible:

Whatever the name

Original U.S. Vietnam War Era Operation Igloo White Seismic Sensor ADSID III Napoleonic 000 helmets were painted horizonOriginal Item: Only One Available. Using the cover of darkness, dense jungle and bad weather, North Vietnamese trucks carried critical supplies down the Ho Chi Minh Trail nearly undetected. Since large numbers of American ground troops were not permitted into neutral Laos to stop the trucks, the U. S. Air Force deployed a system of electronic seismic sensor equipment to thwart the enemy's cover and alert U. S. commanders. This highly classified