Technically an F3, just not the kind you were expecting. 
The PRR F3 was one of three classes of Mogul steam locomotives developed by the Pennsylvania between 1895 and 1901. The F3 served until the 1930's and initially designed for fast freight and suburban passenger service. This model is a Gem brass model that was offered as a screwdriver kit and has been modified with the more modern arc lamp headlight and generator in lieu of the oil headlamp the model came with. The tender has also been modified from the factory one with a reverse light on the tender.
