Classical flying saucer desacends over San Diego.

We were sitting in a drive in movie on midway ave in san diego in late 1970's(a shopping center has now replaced this drive in movie).   We saw a round flying saucer with windows that was spinning and descending about a half mile off to the right of the movie screen.  This craft resembled the flying saucers in the tv series with Roy Thines called THE INVADERS.
As far as I could tell, the craft was was descending toward the san diego bay area which borders the North Island Naval Air station on Coronado.
We were amazed.  Many years later I met a man who said he also was there and saw the craft.  I am sure hundreds of people also saw it.  You might ask the audience when you are on Coast to Coast next time if anyone else remembers this event.