I believe that original Rickenbacker pickguards have masking tape under the pots, backside of the guard. See link. This is from my '75 4001.
But, since the 4002 pickguard is so non-standrard, who knows? The "chicklet" caps look odd but then again the 4002 pickguard is a bit of an oddity. I doubt RIC would have out sourced the pickguard, so I wonder why it doesn't have the masking tape?
Then again maybe a previous owner than Bob hacked up the original and this was a replacement. Either way, it is gorgeous and it is stunning!!!
http://www.fenderforum.com/userphotos/index.html?recid=23689