I have no idea what was used, however I had since come across another copy (from a different source) of the same game which dumped quite similar, i.e. track 0 as DOS and the rest unknown, so perhaps it was 'common knowledge' among some people back then how they could copy this game.
My best guess would be perhaps X-Copy Nibblecopy / Cyclone or PowerCopy? Which other tools were common back then?
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