This is an Official Marvel Comics ONE OF A KIND original colorist art/color guide artwork page used in the direct production of the vintage 1983 INVINCIBLE IRON MAN issue 177 comic book. The Marvel Colorist for this 1980's color guide page is Bob Sharen. This is the ONLY color guide of this 80's Invincible Ironman page in existence (it's 1 of a kind), and it was used in the production of the actual published comic book by Marvel's Production Staff.NOTE: Color guide artwork is different from black and white original art. Color guides (colorist's artwork) are re-sized copies of the pencil and ink original artwork that are assigned to the issue's colorist, and then hand colored by that colorist. Colorguides usually measure about the same size as the published comic book, and some have "color codes" for the printers to follow. Because most modern comic books are now colored by using computers, there are no more color guide pages being produced, which makes the surviving color guide pages highly collectible. G29563.