When I was a kid I was hanging out in the back room of the town police station and came across a box exactly like that, a NOS model 173 still with the cardboard packing, gasket unused, instructions and all. The box was open, box and light were covered with dust so I asked if I could take it home and "clean it up" for them. The Lt. said sure, just be sure to bring it back! So I got to take it home and take it apart, learned what the insides looked like, jumped it to a car battery so it would light up, everything a kid could want. Eventually I washed the dome and skirt in the kitchen sink, Mom was not pleased, dried and reassembled it and took it back the next day. If only I had been smart enough to make them an offer for it!