At first glance, this looks like just another edition of the 1959 Canada by Canadian Pacific brochure presented here awhile back, or the 1965 See Canada brochure posted yesterday. But, instead of being a 16-page, stapled booklet, like those, this one unfolds into one giant (18″x29″) sheet.
A printer mark says “5257,” and since CPR didn’t have domes in 1952, I’m guessing this was printed in 1957. It’s clear why they changed formats in 1959. Though it has the same number of square inches of paper, or even a few more, this format has fewer photos (26 vs. 28) and far fewer color graphics (2 vs. 10) than the booklet versions. It is also harder to read since such a large space is needed to open it up.