Unauthorized prints listed in "Andy Warhol Prints, A Catalogue Raisonne 1962-1987, Fourth Edition" Stamped on verso, published by Sunday B. Morning and fill in your own signature.
In 1967, Andy Warhol made a Portfolio of 10 screen print portraits of Marilyn Monroe from the publicity photo for the 1953 film “Niagara.” The portfolios of 10 screen prints were printed in an original edition of 250. All of the prints from the original edition of 250 were signed in pencil and numbered with a rubber stamp on verso; some signed in pen; some initialed on verso; some dated. Aside from this edition, 26 complete sets of Artist’s Proofs were printed, signed and lettered A-Z on verso.