This is the original paint scheme of what are known as "The Wheat Board Cars". Between 1972 and 1985, four Government agencies would combine to purchase and supply CP & CN with approximately 19,000 covered hopper cars, built to a common standard. They were to be used soley for transporting grain.

CNWX
001-H1044-3E, 3F, 3G

001-H1044-3H
2 cars - Top line of data blocked out
Top line of data blocked out
CNWX (ex-CPWX) re-stencil
001-H1044-3H

2 cars - Top line of data blocked out
Historical Perspective
Cars fromt he CNWX 112000-112026 & CNWX 112500-112645 series (total of 173) were transferred from the series CPWX 600000-601073 (not sure which ones) in 1990, the only time cars were moved between CP & CN. Often the car number has obviously fairly crudely been painted over.

http://www.trainscan.com/data/gc/cxwx.html#NOTE4

road numbers 100867, 101089, 100896