I think you'll find it is a Tikka M77 or M07, in good nick worth about $A850 + a bit more for the scope.

Edited:
Gryphon, sorry my mistake

Just saw the Tikka 12g/.222 part not that it was a 12gx12g x.222!

In that case it would indeed be very rare, I'd love to see photos too!

Cheers

TM