[mrerick]

Although it may seem like a lot of trouble to go to before buying something, it's best to take your time, acquire the reference books, study, spend some time on the forum and develop enough background to make a good choice.

This is "Luger University". Sometimes, people just get lucky without all of this. Sometimes...

You have several of the good books. Since you're focused on the very early Commercial Lugers, consider the three volume Sturgess "The Borschardt and Luger Automatic Pistol". It's rather costly, but remarkably complete and well done. There were two versions published. Get the second one being marketed by Simpson's.

If it saves you it's cost in avoiding a mistake, or overpaying for something, it is well worth the investment in money and time.

Marc