McDonald & Arneson Traffic Master beacon light 

Thanks 👍

So I know from my bit of searching, they made 6V and 12V versions of this light. Oldest versions appear to be WW2 era, and the most common pictures appear to be vehicle mounted. The most interesting was an extendable pole that lifted the beacon up to a high point on demand. Information is limited, and I am still searching some other leads on them.

@@stampeedvalkyrie It would be nice to find an old time stock photo with one of these in use, in practicality. It also seems as though it doesn't make sense that it has 4 random flashers rather than sequential like the train locomotive light from the 1970s that simulated a rotating beacon with stationary lamps.

I have seen them mounted in the 1970’s on top of a traffic light, and it would start flashing when an emergency vehicle would approach well before it entered the intersection. Usually on 5 corner intersections with limited visual oversight.

Sounds like you scored a hell of a deal.

I think so I've got 4 extra flashers I haven't powered it up yet

Several companies made this type of flashing beacon, all are relatively uncommon. This specific light is probably so rare since its from the 40s/50s.

Glass domes never wear out really, not as easily as plastic.

Glass is permanent, until it breaks.