First year of chamber date?

[Lugers down under]

Thanks you very much guys. I was not sure but I thought that the 1910 DWM was the first. I have just picked up a couple of earlier military 9mm
4 inch, one is a 1906 model , grip safety, no lug, no hold open no chamber date, but with military style numbers and the other is a 1908 with no chamber date also but with arsenal fitted hold open , both guns are DWM.
Many thanks
Murray.