Beautiful pair of Burlington grey back F3 AB’s. Appears to be new with original box. I have an extra f3 greyback A unit and other Burlington locomotives and rolling stock, feel free to ask. F-3 AB Unit Locomotives. Dual powered trucks on both units. Dual smoking stacks on both units. Back-up light on B unit. Two road numbers available for ABBA operation. Red/green directional marker lights. # Real metal screens on roof and side. # Lighted number boards. # Stereo Sound System. # Each Unit Length: 20 3/4 ” Height: 5 3/4″. Come visit LGB heaven.