I have never researched my Mauser, I will have to take some pics and see what I can find out. Will post the outcome.
It can get rather confusing. There were three armories making them. Carl Gustav and Husqvarna in Sweden and Mauser Obendorf in Germany. Mauser started in 1898, and then started another run of 5000 starting in 1900, both with different serial number sequence, I think, I know the second series started with #1. I think CG and Husqvarna had their own sequence of numbers also