Tom,
I guess I should have mentioned that the diffs I will be looking at will be on a shelf, and not on a car.

Dan,
Is the plate metal? The problem with plates and stickers is that they tend to get lost or destroyed so I was looking for an alteranate means of positive LSD identification...

__________________
"There are a number of mechanical devices which increase sexual arousal, particularly in women.
Chief among these is the Mercedes-Benz 450SL convertible." --P.J. O'Rourke