well, that's not actually officially an alien. Its a pre "Alien" concept that giger drew, i think part of his "necronomicon", that ridley scott liked and wanted the alien to look like.
err, no. the left side is a little clipped, but you can clearly see the label and what it says:
HR Giger 78."
it was made during and explicitly for the production of alien, and is actually one of the later designs -- sans motorcycle-goggles.