JayG30 is correct that 1928 and early 1929 thru February headlights are different from those used in 1929 for the rest of the year 1929. In 1928 and early 1929 the headlights had one bulb, two filament, with a small opening in the headlight for two wires to enter. In 1929 the headlights had high and low beams, a parking light and the wire opening was a larger one for three wires. This also meant that the conduits were larger in diameter, also the headlight lenses had a different pattern but would interchange. Trucks used black headlamps and passenger used nickel plated. They were not chrome as another party has posted here. The headlight bar was the same for 1928-29.
