Sounds interesting, lack of identification could mean a number of things.
Does it look like the usual areas that should have held markings have been tampered with?
What is the serial number that is visible, just substitute the last 2 or three digits for XX if you don't feel comfortable posting the full number on the net
(and where is the serial number on the rifle)?
Photos are always helpful, as they can help others pick up on anything that could identify the rifle
And lastly, welcome to the forum, and where are you based? NZ/overseas?
I'M a CARBINEAHOLIC!