Doctor Strange (Vol. 1) #180 May 1969 Gene Colan (pencils - Dr. Strange), Tom Palmer (inks - Dr. Strange) and Steve Ditko (pencils, inks - Eternity)
Eternity and Strange figures superimposed over photo of New York City. The Eternity figure is from Strange Tales (Marvel, 1951 series) #146 (July 1966) page 5 (info from John Bacon, 2008-08-06 and Richard Hedge, April 2006).