Original U.S. Vietnam War Era Operation Igloo White Seismic Sensor ADSID III Napoleonic SEROCOLD TO LIEUT

SEROCOLD TO LIEUT

with a nice pin catch on top

resulted in the defeat of French forces by Lord Wellington's Anglo-Portuguese Army

The markings on the receiver are still mostly legible:

Original U.S. Vietnam War Era Operation Igloo White Seismic Sensor ADSID III Napoleonic SEROCOLD TO LIEUTOriginal 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