Bob, the upper right corner of the grip? ..very common thing to loose, known as by some as the 'million dollar ship'. Usually broken off when removing the grips in the wrong manner.
Dwight, could this manual be a usefull part of the survey?
http://forum.lugerforum.com/showthre...threadid=18255
It has listed up all parts and the amount of each that should be in reserve pr 100 Lugers. I guess they have based their numbers on how often the part brake.. just a thought, let me know if you want me to list it up for you