Dyna-Tech and M-Trax frames (maybe other Raleigh frames), can be dated from the prefix letter of the frame stamping (under the BB, not the Dyna-Tech frameset sticker). A=1990, B=1991 etc. For example, my M-Trax is E, making it 1994. Your bike is 'D', hey presto that's 1993.
Not sure you can...