I am often amazed at some of the discoveries that other forum members find on the web pertaining to Lugers. Pete Ebbink is one that comes to mind.
Recently Slashdot had a post about some of the more interesting search methods that Google provides. You can read more about it here:
http://www.eweek.com/article2/0,1759,1640925,00.asp
The article's focus is privacy. But the intersting item is Google's search by file type feature.
For example, you can search for all .pdf files containing "Luger Pistol" by typing the following in the Google search bar:
"Luger pistol" filetype
df
Pretty handy.
Another is the number range search. Try this one:
Luger Serial 0000..5000
Just thought I' share..