Minimal surface rust inside the housing. Black paint finish is in good condition. In my time collecting signals, this is the only one I've seen of this sort. The item "Pennsylvania Railroad Block Limit Indicator Signal (Station Limit Signal)" is in sale since Monday, September 23, 2019.This item is in the category "Collectibles\Transportation\Railroadiana & Trains\Hardware\Lanterns & Lamps". The seller is "velocitymotorworks" and is located in Sterling, Virginia. This item can be shipped to United States.