Amtrak began operations in May 1971 with the Phase I paint scheme introduced in 1972 Three cars converted for use as Display Cars on Amtrak′s Exhibit Train Prototypically accurate window tinting as appropriate Modeler-installed extended drawbar included for 22′radius curves Factory-installed grab irons Turned RP-25 metal wheelsets Proto Max(TM) metal knuckle couplers PLEASE NOTE: As these cars are the correct prototype length and feature full underbody detail to match the prototypes, a minimum 24′ radius is recommended for operation. Officially licensed by Amtrak