Thank you Kuduae.

If you consider the gun number to be 3079, what then do you consider the 168 number to be??

This 168 numering is definatley applied by the original maker in my opinion as it is marked on ALL large and ALL small parts including inside the end cap, grip cap, follower, etc.

Surely no foreign country identification/reproof process would go to that trouble and detail.Simply remarking the receiver ring and Barrel would suffice.
Could the 3079 number be a Vienna maker ID...similiar to the Ferlach maker ID process as below......just a thought.

20.xxxx Stefan Dusel
25.xxxx Martin Kruschitz
27.xxxx Simon Kalishnik
28.xxxx Peter Mischitz
29.xxxx Josef Mischitz
30.xxxx Josef Orasche
31.xxxx Michael Pegam
32.xxxx Anton Sodia
43.xxxx Johann Sigott
44.xxxx Walter Gratzer
45.xxxx Erich Achatz
46.xxxx Josef Schonlieb
47.xxxx Lorenz Schaschl
48.xxxx Josef Fanzoj
49.xxxx Franz Rp. Schmeid
50.xxxx Franz Schmeid
52.xxxx Valantin Rosenzopf