Tsu tsu posted:Thank you! Your comments makes make more sense than my guess. I will narrow down my search to pre-mid 1950s.
It would likely be built after '53' but before 1960.
While paint changes take time, so it might have been seen earlier, the CN leaf and logo officially changes to what you have there in 54, but normally with red included in the leaf.
The early pre-54 logo has a "softer", cartoon like outline for the leaf, and instead has "Serves all Canada" on the square tile (tilted).
1960 begins the CN "worm logo".