Car Features Die Cast Metal Trucks & Wheels Needle Point Axles Detailed Brake Wheels Metal Couplers Injection Molded Bodies Hand Painted Bodies Operating Doors Detailed Underframe Codes on This Model XM - AAR code for a boxcar used in general service and equipped with side or side and end doors BLT 7-56 - this car was build in July 1956 RPKD B&O - CE / 3-26-75 - this car is equiped with friction bearing trucks. IDM 1107 O27 Double Door Box Car Chessie/B & O Die Cast Metal Trucks & Wheels Needle Point Axles Detailed Brake Wheels Metal Couplers Injection Molded Bodies Hand Painted Bodies Operating Doors Detailed Underframe RA 3-74 - this is the location and date of service done to this car