I'll work on getting the correct part #. I have never seen the amperage color swabs on anything earlier than '70. The sole exception being a special "isolated field" alternator used in some higher amperage applications in 69. Strange looking piece. What we do typically find on the back shell near the top threaded hole is a black or red dot. Usually about the size of a pencil eraser. The NOS and low mileage originals appear to have a thick coating of tinted insulating varnish on the stator frame. Sort of a translucent walnut color which quickly rusts underneath. Rotors are finished in the same type insulating varnish. I'm not very picture savy but maybe another member here can post up something.