kysunfish
Welcome to the luger forum. Highly unlikely that yours is a single digit commercial luger unless I am terribly wrong. Commercial production is believed to have continued throughout the years with sequential numbering, so with that in mind you would have to possess one of the very earliest of lugers. It is possible that yours is a military example and thier would be several over the years that would have single digit serial numbers without a letter suffix. Also if you have a contract variation they also started with a single digit and continued upwards.
Could you tell us more about your luger, short of pictures that say a thousand words try and account for all the markings and where they are located on the luger,material grips are made out of, length of barrel, caliber of gun if you know it, and describe the colour of small parts, ie ( blued or strawed).
By way of the commercial stamp can you be more explicit.
The nickel mag with wood bottom is early production. The luger will be between 1900 and 1930 with an absence after WW#1 untill 1923.Production resumed again starting at aproximately serial number 73500 .In 1930 DWM ceased production, although at that time serial number ranges were up to 96000 before mauser took over so you see what I mean about the comment of "highly unlikely" as the 1900 commercial model started with 01 as the starting serial number.
Hope the information is helpfull and you post more info on your fathers luger