Tuska Iron Man Sketchagraph

This is a cool piece! It is by George Tuska and is an image of Iron Man and a mysterious villain with a skull-like appearance. What makes it cool is: 1, the color and 2, that it is a Marvel Silver Age Card. These were made for the artists to sketch on and once completed would be trimmed down to trading card size and randomly inserted into packs. This one was never trimmed or inserted. There are pics to show both the front and the back of the piece.