By American Optical. Excellent frames with only minor wear to the plating on exposed edges. These have the less common 'tube' vents on the frame. Stamped with 'AN6530' on the hinge. Fitted with green tinited glass lenses - the right of which has a 'shell' chip at the inner edge (see photo). The rubber cushion remains supple and is undamaged. The chamois backing has light even soiling indicating only light use. The strap is also in very good order. A very good used pair. Stock code G21044.