This is a beautiful vintage Weiss clear rhinestone necklace.  All of the rhinestones on the necklace are set in prongs and there are none missing.  The only place where rhinestones are missing is the clasp.  They were not set in prongs.  I didn't even notice it until I looked at the clasp through a loupe.  The clasps are signed Weiss in two places which you can kind of see in the last two pictures.  I could not get a clear picture.  The rhinestones are round and tear drop shaped.  It is very sparkly.  It is 17-½" long.  The last picture is the back of the necklace.