PTO for the R390A military radio receiver, manufactured by Cosmos Industries. This PTO is "used", but was overhauled at the Tobyhanna Army Depot in April 1984. Depot overhauls are generally considered as good as new, and this unit is in exceptionally nice condition. It came to me in a sealed foil bag (see last photo), opened only for photography, then re-wrapped. This is about as close as you can get to a brand new PTO!