Vintage Eyeglasses Salesmans Sample ? Gold Frames ? UNUSUAL

I am selling a vintage pair of eyeglasses, that appear to be possibly a salesmans sample. i think this, because the frame has 3 options. it has hooks on the rims, to snap them in place. or the attatchment piece, on each end, to attatch the usual arms that go over each ear. and also they can be used as nez pince glasses, with the flexibility to to sit in place on the nose. see photos. the frames may to possibly be gold. the metal is untested, so i do not know for sure. the glasses measure approximately 4" wide. good vintage condition. no chips, cracks or breaks to the lenses. nice pair of vintage eyeglasses, to add to your collection.