Observed a very long, shiny object over the San Fernando Valley in or around 1968.

About 1500 hrs, being an avid aircraft enthusiast, I noticed a very bright object very high in the sky over the west end of the San Fernando Valley.  It was very narrow and very high in the sky, but was very bright (silver in color).  The sky was very blue and there were some small puffy clouds that passed in front of the object which remained stationary for about five minutes.  It then moved in the direction the clouds were moving for about 5 degrees and stopped.  After a minute or so, it then moved in a direction opposite of the travel of the clouds.  By this time, most of the neighbors in the neighborhood that were home were outside, watching and commenting on the event.
After a few minutes of remaining stationary again, it then simply shot off (apparently upward) and was out of sight almost immediately.  No noise was made and no other objects were visible.  As a neighborhood, we all commented on this, went back to our homes and afternoon activities, and really never commented on this event again.
Date is approximate.  PD