Mayhem ‎– De Mysteriis Dom Sathanas - Instrumental Mix 1992

From Discogs page: Instrumental rough mix compiled on tape by Euronymous late 1992, spread in selected circles. These recordings are NOT the same as found on “From The Darkest Past“... these versions have never been released before. These songs are instrumentals of “De Mysteriis Dom Sathanas“ in very good, almost crystal clear sound.