This is the 2 step pilot used on later model Lionel #2328 GP-7 and GP-9.
Commutator used in all veritcal, pre & post war, armatures. Mfd by Model Engineering Works
FF3200008 Reverse Mechanism Arm/ Rear/Short, Railking Trolley
IE0000039 Coil Spring/ 5mm x 16mm x 0.2Thk/Trolley
This is two (2) pairs of motor brushes and matching springs to revitalize most Lionel post war steam and diesel locomotives. This set contains four (4) #622-121 motor brushes and four (4) #622-191 springs.