A civilian witness reported that a disk shaped object, 100' in diameter and 12' thick, hovered at 500'.
This object, complete with windows, would be classified as a flying saucer, and in 1955 was supposed to be investigated by Project Blue Book.
It was reported to the Air Force as the UFOB Index Card shows.
The observer was driving a vehicle at the time of sighting and estimated that he was one mile from the object at this time.
Due to the brevity of sighting, 20 to 25 seconds, the delay in the receipt of the preliminary report at his headquarters, and, therefore the improbability of investigation turning up more valuable information, no subsequent investigation was directed.