1984 - Anatomy of a cover - New Teen Titans (1984) #3

http://www.comicartfans.com/GalleryPiece.asp?Piece=73327&GSub=6063

1980 - The Comic Times #3

THE COMIC TIMES #3
- published by THE COMIC TIMES INC.
- November 1980
- featuring a 16-page interview with George Perez

The colourist obviously didn't have a reference for Trigon. :)

Here's the original.