Disk shape craft with spinning lights over Rochester

This happened sometime in 1972, during warm weather, the sky was dark.  
My mom picked me up at work at a department store in Greece, NY, which closed at 9:30.  Shortly after she turned onto Ridge Rd., I looked up and saw a disk-shaped craft hovering over us.  It was perfectly round, and had spinning lights around the perimeter. 
 I made my mother pull the car over and I got out.  Ridge Rd. is a very busy street, so I couldn't stay out of the car long.  My mother saw it, too, and brushed it off as being an advertising plane of some sort.  I never saw an advertising craft like that!  And in the dark sky!  
I have always wondered if someone else remembered it.  I wonder if it's the same craft reported in Buffalo on 6/22/72.
Witness indicates that the date of the sighting is approximate.  PD