As far as I know, the game was never available for DOS. The DOS versions you may find around are a C64 port that uses the program "Magnetic: An interpreter for Magnetic Scrolls adventures" by Niclas Karlsson. The DOS pics in this very site are from that version.
How to find out if yours is a legit DOS version instead of this port? Easy, it shouldn't carry the MAGNETIC.EXE file. Add
Did You Know?
All Magnetic Scrolls games (pre-Wonderland) are actually made up of a 68K CPU emulator and 68k data file.
Their first game, The Pawn, was written for a Sinclair QL. Rather than re-write the game, they just wrote an interpreter (much like Infocoms famous Z-Machine) for each architecture (C64, Amiga, PC, Sinclair, etc).