In the New member's Forum there is a thread entitled "Weimar Lugers". I posted a picture there of a 1918/1920 DWM double date Luger that I once owned. Clearly shown is the extractor with the last two digits of the serial number (92) and directly under the number is a "dot".
Now got to:
http://www.gunbroker.com/auction/Vie...p?Item=5314558
Note that in the pictures of this 1918 DWM, there is a "dot" after the last two digits of the serial number on the sideplate and also the forward toggle link.
Has anyone else noted similar "dots" on other Lugers? Any ideas as to the significance of them... if any at all?