[Bill_in_VA]

It’s a commercial Luger, what’s commonly called an “alphabet Luger.” Yours is in the “n” block which puts manufacture at around 1925, IIRC. It is .30 caliber, not 9mm, and was made by DWM and imported into the US as evidenced by the “Germany” stamping. The finish looks original, albeit rough with pitting. The alphabet Lugers are one of the most common variants but one of the least desirable because of the caliber and lack of “mystique” otherwise associated with military guns. Matching, excellent condition alphabet Lugers are fairly common and can be found in the range of $1200-1400. With the finish issues yours has, expect it to be worth a few hundred less.