@pennsyfan-- Bob, I do not have an "official" catalog for the year in question. However I am enclosing all the pictures I have from my Flyer pre-war O gague reference. All the pictures, no matter if a drawing or a photo, show the loco marker lights as "holes" with a cast rim. Hence I suspect that these are just colored celluloid mounted inside. Nothing hints at a bullet shape forward. Note this illustration is actually from "Playthings" magazine in 1934.
Actual photo , again the forward loco marker lights just appear as circular holes with a cast raised rim. I expect that the headlight is illuminated the same way as the side lights with the light of a single bulb supplying illumination for both the head light (no color) and for the side marker lights which achieve color through using colored celluloid inside.
Here is a color photo of the entire 3 unit (3 cars + loco car) train. Again, no lights appear to have bullet lenses.
Here is a close up of the observation. It would appear she has 2 lights on each side and a rear "tail light". None of them appear to have "bullet" lenses so I would expect that the rear , as in the front, the illumination or light is supplied by a single bulb or illumination source and the lights are "colored via celluloid inserts of the proper color. In this picture, to me who is no expert for certain, I can understand the left and right side markers with their aerodynamic fairings, but what the circular opening just above them represents I simply do not know. With these odd circular openings in the roof labeled as lights, there would be 5 total "lights" in the observation, including the taillight. All the lights in my view are just openings cast into the basic body with either fairings or raised rims. There does not seem to be any evidence of any "bullet" lenses.
Hope this helps. If I can be of any further help, let me know.
Don