This photo has been used by at least four different postcard publishers (including Dexter Press 59052), and we know this because we have examples from all of them, ten cards in total.  The colours vary slightly according to print run.  Captions are the same except for one thing:  some say “Oregon” only, while others say “Oregon and Washington.”  One of our cards was mailed in 1958, with three-cent stamp and postmark (Grade: 1, $2) and all the others are unused Grades 1 or 2 ($1).