What is considered a correct Ford factory-issue 64.5-66 headlamp bulb? I read in Mustang Monthly that there were 3 manufacturers at the time who made bulbs for Ford: GE, Westinghouse and Tung-Sol (TS). Did all these manufacturers make the bulbs with the FoMoCo script or was the script just on the factory replacement bulbs? Do any of these manufacturers still make a correct-type bulb. I understand that Wagner currently makes a bulb with the FoMoCo script but they did not manufacture bulbs for Ford at that time.