On or about 7/10/1955 I observed a circular gray object on a cloudy day in the sky for a few seconds as the object moved between clouds where there was a brake in the clouds. I could see the blue sky above the object. The object had a dome with what appeared to be windows around the dome. I was with a friend but never told him because I figured he would not believe me. I offer this because your files may have similar incidents around the same time.