Acrylic on canvas, stretched and ready to hang.
Signed on the front.
Dust off : The call sign that was specific to the U.S. Army air ambulance units during the Vietnam war.
First used by Major L.E. Spencer Commander of the 57th Medical Detachment ( helicopter ambulance) in 1963, the call sign went on to be used for the duration of the war ... These skilled and brave helicopter crews flew thousands of sorties and saved countless lives ..