After the raging success of the original series of Disneykins, Marx extended the line with a second series, called (shockingly) New Disneykins. This Mad Hatter is from that series.
As with all Disneykins, and in fact all Marx figures, the Mad Hatter came in a box. Two variations exist, the green box above, and the window box below. The window boxes are by far more scarce than the green boxes.
All second series Disneykins are quite rare, probably because they, unlike their first series cousins, were only produced for a short time - perhaps as little as one year.