ORIGINAL Vintage 1959 era USA Supro Valco National Guitar Knob ..ROGAN BROS, ILLINOIS, Plastic construction,  GOLD  reflector cap, flat head set screw, black arrow point marker. Normal light vintage wear, NO CRACKS, Set screw holds nicely, fits 1/4" shaft. RARE USA knob! Condition is "Used". Shipped with USPS First Class.THANKS for looking!