Though we're sure everyone knows about the original Kenner small head Han Solo figure and how it was switched out with a larger head early in the production run, most think it was only available on 1978 Star Wars cards. It is safe to say that for the most part that is true, but there are a few examples of it packed on The Empire Strikes Back card backs as well. If you've never seen this rare variation, you should follow this link to check out the 31 Back Small Head Han Solo auction.