Michael,
* Okay. Found another DWM pistol reference & picture. Possibly a predicessor to Douglas's reference. In the 1971 Stackpole published "German Pistols and Revolvers, 1871-1945", Pg.29 by Ian V. Hogg. Library of Congress Catelog Card # 74-29815 & ISBN: 0-88365-299-4.
* Contains an elementary breakdown of the demographics of this design. That is: Make, Caliber, Method of Op., Safety, Mag, Capacity, Markings, etc.
* You'll get a kick out of the listed O/All Length as 6.0"/152mm, Bbl. length as 3.5"/88mm, 6 grooves-R/H twist, and an empty weight of 20.0 oz./0.57kg. Either we're talking allowable Mfg. tolerances, round-off, & measuring instrument allowable error or someone isn't hitting the re-zero button before measuring/weighing.
* Picture shows an example with what appears to be the early M22 walnut checkered grips w/ No Logo.
* Contains take-down/re-assembly instructions which you have obviously mastered; but, little new additional info.
* Hhhmmmm!! Is that a lower case S/N suffix "a" below your numeric "711" I see in the pictures of your Frame, Barrel, & Slide?? Is Onaway's example also an "a" block?? Maybe we can get Pancho resting easier without medicinal "supliments" if they are 10,000 apart. Then again, maybe not if these are non-Rx supliments taken "on the rocks". Per Jan Still in Weimar Lugers, Vol. V, DWM started to use the suffix block numbering system for commercial Lugers in 1921. Must be a carryover to all the different DWM models (2-3??) produced.
* Enjoy.