This is an original artwork, one of many interior illustrations Ned created "The Coelura" by Anne McCaffrey, published in hardcover by Underwood- Miller, 1987 (I'm showing the published cover as reference).  This particular work appeared on page 30, painted in black-and-white acrylic on paper 15" x 12.75: mounted to board 20"x 15".   There is tape on the perimeter where it is mounted to the board, this will easily be camouflaged by matting.  It's a great image!