Hello Noel,
I am pretty sure this 1920 Commercial luger was a 4-digit + suffix serialled pistol that was numbered in the commercial style.
According to Jan Still's book, "Weimar & Early Nazi Lugers" on pages 28-29; this one might be what Jan call's the undated "Commercial Subvariation" from the "Alphabet DWM" series (using Jan's newer terminology). Similar photo is shown by Jan on page 270 in the same book.
On page 29, Jan writes about these Commercial lugers in the i,k,l,m,n,o,p,q, and r serial range that "...these have been long termed 1920 Commericals...".
I am pretty sure it had the upright C/N proof, had a short barrel that could have easily been 3-5/8" rather than the 3-3/4" I reported earlier, and had the "Germany" stamp(s).
However, this stop at DJ's was my last after about 5 other shops and was at the end of a grueling road trip, so I might be wrong on some details. The shop is listed in the yellow pages and the folks seem to be very friendly on the phone...so if you have interest, you might give them a call. I am sure this one is a very nice pistol and in great original shape...
I really do still get confused, myself, about the Weimar-era pistols...but maybe that is a permanent state for me...
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />