Located at 22nd and Fairmount Ave., at the time...

A cylinder shaped vessel descended then hovered.  It was the size of a bus but larger in diameter. The craft had no wings, windows, tail, or markings. T
he vessel was coverd with light that swirled in patterns of different light.  It was very beautiful to watch. I believe it was covered with a field of plasma like our Sun. The ship hovered over several roof tops and flew vertically up the street following the outline of the buildings. It was almost silent, except for a loud single click sound when it stopped and moved again.
A report of this sighting can be found in The UFO Investigator Vol 111, No 3 June-July 1965. A summary is located in the book "The UFO Encyclopedia" by John Spencer. There is also a sighting in this web sight which I believe is the same object reported in July 1965. 
At one point I was only about thirty feet form the ship, I was looking at it from a thir floor apartment window.  The ship hoverd down my street then flew over The Eastern State Peniteniary then flew away out of sight. The ship was spotted by an aircraft flying over Philadelphia the pilot; was a TV host named Arthur Godfrey.  He then reported this same sighting on his national TV show a few days later. 
I am a retired Air Force Officer and I'm certain this vessel was not from Earth.