Anyone know anything more specific about these? I do know they were later offered (around 1953) with an all red plastic lense top cover, allowing the light to radiate 360 degrees. I suspect this could be the earlier version, since it has the solid metal chrome top. It is 6 volt and it operates with a parabolic reflector that moves around a pretty powerful 6 volt bulb (50-100 CP). I will get more internal pics. Motor and shaft are very unique in design and the way it operates. From an early ad copy it appears they didnt have a model# assigned. Im guessing pre beacon era for sure. They are very large, about 13" long and about 6" high in the front.