Vietnam era SOG CIA style knife. Presentation knife? Knife is styled like a CIA knife, with a SOG aluminum style handle, with screw/nut attachment as seen in a SOG as well. Knife seems to be chrome plated brass. This knife came from a Special Forces vet’s estate, per a current SF trooper. I have never seen another one. This may be the deal of the century with CIA SOGs bringing $4k plus.