If you're talking about the scale shield, I don't think it would add much value, if any at all - unless it was a pinned shield, and could be proven to be a factory error. (I have an old error coin collection of my dads; I find errors like that intriguing.) I see Case knives every once in a while with missing shields, and I assume it would be an easy job to glue a replacement shield back into that spot, upside down. Most are glued in, but several of my old Case knives have pinned shields. If a pinned shield was mounted upside down at the factory, I couldn't say whether they would have any value.
Several years ago, the shield popped off my little freebie NRA lockback. My wife had the idea of engraving my initials onto the back (blank side) of the shield, and gluing it back into the scale. My little knife (actually one of my favorites) would then be personalized. So, just an idea for you if that shield on yours ever drops out.
~Chris