Anyone know where the old coaches were from or going?

On July 2nd, I saw from a distance, on a passing CN freight, in southern Ontario, heading west, perhaps to the USA, two old geren coaches.

They were the third last and second last car on the freight. The roofs were black, and the sides were green. Looked like gold or yellow lettering on the side. Although it was from a distance I am guessing the windows were out.

Wish I was close up when I saw them.

Anyone know where they were from or heading to?

Possibly to a museum?
Were they Pullman green?

They may have been old CN coaches (right color scheme) to rebuilt into Camp cars for CN construction and maintenance crews, possibly to replace still older CN monitor roof coaches in this service.