(the seller) showroom while in Houston and while they had a couple of nice pieces, I felt most all of their Lugers were overpriced. The most unusual guns I thought they had were a consecutive serial numbered pair... I don't remember the model for sure but I think they were 1906 Portugese models.
They had a custom 16.5" carbine that they identify as pre-WW1... but why would someone use that length barrel pre-WW1 before the National Firearms Act of 1934 defined short barreled rifles? When you look at the photos it appears to be very front heavy as far as balance goes. It used a rear toggle from a Navy, and the frame may indeed have been pre-WW1, but I am leery of the authenticity of the age of the entire unit. Looks Nice but the price was $2750!
Here is the URL for their current web page listing of Lugers.
http://www.collectorsfirearms.com/modernhandguns.htm