Welcome to the forum. Your first Luger will not be your last.
The most important thing is that it ran flawlessly. Even matching Lugers sometimes don't. I once had a beautiful Mauser Luger that wouldn't
No, it's not normal for the middle toggle maker's mark to be removed. It does appear that most - possibly all - of the parts were made by DWM. Overall it's a nice looking Luger that will give you a lot of pleasure to own and shoot.