This is a Bachmann 74403 HO Scale Canadian National Ready to Run Test Weight Car #52257. Test Weight Cars had known weights so track scales could be precisely calibrated. They were used to check axle load limits and to determine the billing of customers for cargo loads. Die-cast body Manufacturer: Bachmann. Model Number: 74403. Road Name: Canadian National (CN). MSRP: 49.00. Scale/Era: HO Scale. Model Type: Freight Cars. Availability: Ships in 3 to 5 Business Days. Trainz Product Id: 12333366.