Those figures were hardcopies created before the final production figure and used for photography purposes like the cardbacks.
Here is an image of a group of ESB hardcopies on another ESB cardback which include both the Han Hoth and the Rebel Soldier.
What's even cooler about this group of figures is that they survived! (well.. most!)
I believe Jordan from Hollywood Heroes sourced the entire group many years ago- I am not sure if they are all still together in one collection.
(BTW- none of these cool paint schemes made it to production figures)