This is a 4 way railroad signal lamp made by Harlan of St. It's an official lantern, but was made into a table lamp for sale by the company Railfinders. This belonged to my great uncle who was a signal master for the Southern Pacific Railroad.
The lamp is brand new and works perfectly. It still has the original shade which is in mint condition. This will be packed in an oversized box to accommodate the shade and avoid crushing. So if it's a bit pricey, that's why.