This is a Union Switch and Signal Electro-Pneumatic dwarf semaphore signal off the Chicago Transit Authority. It runs off 80PSI of compressed air and is a two aspect signal. It is in great working condition! For a display I put air to it and then just put a bolt to hold the air cylinder in place but that can be remove by just pulling the bolt out. The back lens is cracked and I dont think it was original anyway.
Here is a video of the signal operating. I travel so I can meet up around St. Louis by a few hours; traveling to Ohio, Wisconsin, Indiana and Kansas this summer. The item "CTA Electo-Pneumatic Dwarf Railroad Semaphore Signal Light" is in sale since Sunday, March 14, 2021. This item is in the category "Collectibles\Transportation\Railroadiana & Trains\Hardware\Lanterns & Lamps".
The seller is "laser711" and is located in Union, Missouri. This item can't be shipped, the buyer must pick up the item.