Yepp, promo-tape, from before the first album. It contains 4 song, Substitutional World, Lord of the blacksmiths, Mindtraveller and Entering eternity.
But they do not sound like on the album, it's demo versions. Some of them dosn't even sound like the same song, but they're still good.
As I understand it was just meant for magazine-reviews and record labels. Not for the normal musik listener.