On the wall bracket is the number 12288. The burner has Use Kerosene Oil Only.
There is no indication which railway used this lamp. The lamp is likely from the earlier part of the twentieth century as Adlake moved its manufacturing from Chicago to Elkhart, IN in 1927.
Marker lamps were used to mark the end of the train with red lights if it was moving and with green lights if it was passable. Antique Adlake 4 Way Non-Sweating Railroad Signal Switch Lamp Chicago w/ numbers. The item "Antique Adlake 4 Way Non-Sweating Railroad Signal Switch Lamp Chicago with numbers" is in sale since Tuesday, April 9, 2019. This item is in the category "Collectibles\Transportation\Railroadiana & Trains\Hardware\Lanterns & Lamps".The seller is "pelkadot25" and is located in Batavia, Illinois. This item can be shipped to United States.