Released as part of the GW 25th anniversary celebrations. The box is the limited edition, most of the contents were generally available, only the Emperor's Champion and the Marine Captain are limited otherwise.
The box contained:
Commander Lord Dante, Lord of the Blood Angels
Commander Azrael, Supreme Grand Master of the Dark Angels (with Helmet Bearer)
Wolf Lord Logan Grimnar
Marneus Calgar, Master of the Ultramarines
The Emperor's Champion
Space Marine Captain (Christmas Special Edition)
Space Marine Captain (from the old Command Squad box set)

There was also an Enemies of the imperium Box, which contained no limited pieces.