Im still kinda new to lugers, but I'm sure someone will ask about the letter on front of the trigger guard that goes with the SN. They are considred alphabet lugers.
I downloaded a spreadsheet off this forum that had a list of lugers and SN's which I will attach. There may be an updated one somewhere on this forum. Cant remember where I got it. But I did see a SN 48 M luger. Dont know years though. Ill let you browse through it.
IMG_4631.jpg
DWMCommercialDatabaseV4-Ed.pdf