BLACK TIE

From the New York Times 19th September 2018:

 

See the photo below

THE TIE:  See on the left with black bow tie: Black tie worn correctly except the lack of a waistcoat.  Right side: dressed for a funeral with a black neck tie.  BLACK TIE NEEDS A BLACK BOW TIE.

a

THE WATCH: IT NEEDS TO BE AN ELEGANT WATCH

Black Tie requires an appropriate dress watch, either a pocket watch or an elegant dress watch.  A sports watch is always incorrect.