Iron Man and Sub-Mariner #1 is a one-shot written by Roy Thomas and Archie Goodwin.  It has an amazing cover by Gene Colan.  This issue begins the stories which continue in Iron Man #1 and Sub-Mariner #1.  This Silver Age key book is graded 9.4 NM with white pages by CGC.  Alignment is perfect, color and gloss look excellent.   It's a beautiful copy!