I don't know s**t about Cherry codes, but the Q seems to indicate clears.
See here:
http://geekhack.org/showthread.php?t=13096Basically, at least for the g80-3000, LSC means blues, LQC means clears and LPC means blacks, and it stands to reason that Cherry would use similar code systems for all its products.
The last two letters are the layout, i.e. yours, which is LQE-DE, is German.
The fact that the Cherry.de site mentions blacks may not mean much, they may have made this keyboard earlier with clears or it may have been a special order.
Disclaimer: I'm just guessing.