Yup, black, as were the lailamp housings. most likely, the lamps and the brackets came alredy painted black from Guide, so no painting of them was done by GM. Seems most lamps manufactured by Guide were painted black by them. Many tractor manufacturers used Guide headlamps as an option back in the '40-'50s. Most of the time, when the housings are stripped for repainting, there's black under the red/green/orange that the rest of the tractor was painted.
