Sunset Model 3rd Rail O Scale New York Central F3 A-B Powered Locomotive Set 3R
Rd Rail O Scale New York Central F3 A-B Powered 3 Rail Set (1606 / 2404). For sale is a new set of EMD F3 A-B NYC O scale 3. The B Unit was originally a 3-rail unit, converted to 2 rail, and then back to 3 rail by the 3.