Rene, why "end of 1 ww" and why do you think, that "from 1916", i.e. this new reverse design was introduced in 1916?
Did you see any others medals from 1909, 1910, 1911, 1912, 1913, 1914, 1915?
Or from 1917, 1918, 1919, 1920, 1921, 1922 and 1923 for that matter?
The only thing that we know for a fact is that in 1907 these medals still had old style reverse.
Why?
Because I have scans of such medal with date ١٣۲۵ on reverse
As for your medal - looks like it has ١٣٣۴ (although the image is not very sharp) on reverse and different seal in the centre of reverse.
Could be stylized (?)
احمد شاه مسعود
Ahmad Shah