cactus jumper:
I am in agreement with you - I think that is an original copy of Old Arizona Treasures.
When I wrote about the "pamphlet" format books, I was thinking about The Golden Crescent, Western Treasures Lost & Found, More Western Treasures, Some Western Treasure Trails, etc.
Both Southern California Treasures (1969) and Old Arizona Treasures (1968) are very professional large-size paperbacks. They have slick (glossy) cream colored covers. OAT has a map in dark red on the cover, as well (is this Father Sierra's map? Not enough shown for me to tell - it is, of course, quite interesting).
I wonder if Ed stopped doing his own printing and binding and had these done at another shop.
Anyway, I absolutely agree with you - you sure appear to have a nice, signed original copy. Hold onto it!
Good luck to all,
~The Old Bookaroo