Foldout souvenir mailer from Mount Wilson, California, sent on June 15, 1929.  Contains nine images, taken from photographs, of Mount Wilson and the exterior of the observatory, plus the stage schedule and prices, pages of description, etc.  Views include the Mount Wilson Hotel, a hotel cottage, wildlife and scenic views.  With brief written message describing a visit to the observatory (views the moon and Saturn through the 60 inch telescope, etc.  Message written in proper space and at top borders of two pages.  Condition: flap torn, as well as stamp; minor foxing, soiling, outer pages.  There are 18 fold out pages, with no splits or separations.