Lionel Prewar # 437 Switch/Signal Tower and # 440 Signal Bridge
Some prewar Lionel accessories appear in this photo. A # 440 Signal Bridge spans two tracks and lets trains know whether or not to proceed. A # 437 Switch/Signal Tower is positioned just under the monorail. I use the knife switches located on the rear of the tower to control three power blocks on the third level track and a few accessories. Next to the track near the switch tower are a green # 161 Baggage Truck and red # 157 Hand Truck.