David, I would like to add my welcome to the Luger Forum. Your Luger is known as a second sub-variation and was likely completed in about June 1937.
If indeed you are correct in the information provided, Simpson LTD, a Midwest Retailer, would value the pistol at about $1800. Since it has two matching magazines, I would add an additional $500 or so. The holster might be worth $200 to $300. So I guess I might value your system at about the $2500 range.
Hope this helps!