Hello Jason,
It seems we have a parallel mix up when you sent me a private message 11 days ago from the Jan Still Forum and when I first contacted you from this forum a few days ago when I saw the images of your M1900/02 Long Barrel Luger. I gave you my e-mail address to send images of the other Luger pistol serial #10000B.
Without forgetting my dear friend Ron whose knowledge on the subject I always value - expect for the M1906 'Russian Contract' Lugers
- we both appreciate and bless your very rare Luger pistol and will gladly share our knowledge with you as we learn more information about these special order pistols (several with the 'GL' hallmark such as my M1900/02 'GL' Tangent Sight Luger serial #20 with a 155 mm barrel without a stock lug) which were made and sold/delivered between 1902 and 1910.
Enjoy,
Albert