Fran Ridge:
April 25, 1952; San Jose, California
11:00 AM. Scientists have  close encounter with small daylight disc and other objects. A biochemist and a bacteriologist employed by a private company were driving to their office when one of them saw something odd overhead that seemed to be moving against the wind. They entered the company parking lot and got out of the car to look. Directly over a building across the street was a small, metallic-looking disc, tilted at about a 20 degree angle and rotating around a vertical axis, wobbling "like the motion of a disc in a water meter". The distance was estimated to be about 50 ft, and the disc appeared to be 4-5 feet in diameter The wobble allowed them to judge the thickness as about 1.5 feet as the disc proceeded directly over their heads, continuing to rotate and wobble. No sound or exhaust emission of any sort was detected. It moved in an arc about 40-50 feet overhead very slowly, perhaps 8-10 m.p.h. When it neared some railroad yards, the disc curved around and made a fairly distinct turn, heading back toward them. At this point both of them suddenly saw something else overhead, a.pparently much larger than the silvery disc, perhaps 100 ft in diameter (See report by Richard Hall)

Detailed reports and documents
reports/520425sanjose_report.htm (Richard Hall)