The piece is the display section of a Cab Signal that was located in the cab of the locomotive. What we have is a vintage two directional piece. The Cab Signals were often mounted on the Central Pillar between the windshields so that the two faces could be visible from either side of the cab.The lens are in place, and 7 of the 8 brass hoods can be seen. The piece is solid, and the cast iron is heavy. The paint shows wear and flaking. The cast iron indicates an earlier model that was used to let the train engineer know the requirement speeds on that section of track.
The Pennsylvania Railroad pioneered testing on cab signals in the 1920's, and eventually cab signaling became the standard replacing wayside signaling. Although cab signals could be different on various lines, this is a sample of the meaning of the. Green = Clear - allowing max. Yellow over green = Approach Medium - approach next signal at medium speed of 30 MPH. Yellow = Approach - proceed at medium speed prepared to stop at next signal.Red over yellow = proceed at restricted speed. The last picture shows a later model, four light. This cast iron Cab Signal with the brass light hoods may have been in a steam locomotive. Beside displaying, this piece offers various opportunities to use in a customized light presentation. I just shined a small flashlight to show the four color lenses. Please look at the pictures for the best description. The item "Vintage Railroad Cab Signals Good Lenses" is in sale since Friday, December 27, 2019. This item is in the category "Collectibles\Transportation\Railroadiana & Trains\Hardware\Lanterns & Lamps". The seller is "russelld83" and is located in Indianapolis, Indiana. This item can be shipped to United States.