Postcard - Seattle, Washington

"The Space Needle, Seattle, Washington. This Seattle landmark rises to the height of 600 feet and is topped by a restaurant which revolves 360 degrees every hour. About 260 persons can be served. An observation deck and snack service is also atop the Needle for those who wish to feast mostly on the tremendous scenic panorama."

Late 1970s is my guess. No later than 1981.