This is original art from Iron Man Sub-Mariner #1 page #25 titled "The Torrent Without, The Tumult Within". Art (pencils) is by George Colan and inks by Frank Giacoia. Original art from Iron Man Sub-Mariner #1 is very rare and hard to come by.
Original art is one of a kind. This is the actual art drawn by the artist(s) used to produce the comic book.