Pictures posted for Jag.
Since it has been nickled at some point, this negates its "collector" value, but still a nice looking gun and a fine shooter
The Information you have is good, the DWM is the manufacturer, probably a post WW1 for the commercial market (although they didn't ship in nickle), the crown N on the left is a commercial proof marking.
The 05 is of course the last two of the serial number and was stamped on many parts, just as you mentioned.
BTW, the magazine looks like it is in real nice shape, as are the grips!
Ed