FileaPhal, Dwight was trying to explain that DWM only stamped a limited number of parts on each Luger produced for the military with military inspection proofs. e.g., the right-side receiver of a military pistol - both DWM and Erfurt - will normally have 3 crown-over-letter stamps plus the arsenal eagle which is different for DWM and Erfurt. (There ARE exceptions - the very earliest military Lugers - but we won't get into that here.) A true commercial pistol will not have these stamps.
Erfurt Lugers, OTOH, will have a crown-over-letter inspection stamp (like those in the picture) on just about every part of the gun; locking bolt (takedown lever), sideplate, grip screws, trigger, firing pin and so on. IF the 1920 "commercial" Erfurt is so marked on the various parts, then it began life as a military pistol. IF there is a date on the pistol - DWM as well as Erfurt - then it was a military gun. I have never heard of an Erfurt Luger manufactured by the arsenal as a commercial pistol and my money is on the Erfurt "commercial" having first been a military pistol that was converted at some later date.... an ordinary model P-08 in 9mm converted to .30 caliber.
The attached picture shows typical Erfurt military inspection stamps and eagle on the right receiver wall.
YOUR 1906, OTOH, IS a commercial pistol and was from day one. The serial numbers on the locking bolt and sideplate will be underneath and not visible from the side. That's standard commercial placement. There will not be military inspection stamps of any kind. I hope this helps to clear up the confusion.
