Lionel 6-18846 O Gauge 1997 Centennial Series EMD GP9 Diesel with TMCC - NOS Tractor Trailer The AR-1 uses tiny Opto-Sensors

The AR-1 uses tiny Opto-Sensors mounted between the rails where they are shaded from ambient room light by a piece of rolling stock

dings and burrs

Slipper clutch

NS acquired several SD60Is with the breakup of Conrail in 1997-1999

Lionel 6-18846 O Gauge 1997 Centennial Series EMD GP9 Diesel with TMCC - NOS Tractor Trailer The AR-1 uses tiny Opto-SensorsLionel 6 18846 1997 Centennial Series EMD GP9 Diesel with TMCC Scale: O Gauge New Old Stock Features: Lionel TrainMaster Command Control equipped RailSounds 2. 5 Powerful Pullmor motor Operating die cast knuckle couplers Die cast trucks Metal wheels & axles Metal chassis Directional lighting Illuminated Cab Engineer figure in cab Lighted headlights, number boards, marker lights Flashing strobe light on cab roof Operates on O 31 or greater curves