Hi all, I am asking this for a friend as he is not able to find anything about it.

The rifle is a Savage 99G made in 1923 and is a 22HP. The markings are 3NN and comes from Queensland.
Does anybody know what the 3NN markings are from or for. They are on the butt just before the action and on the metal work just in front of the action on the metal.

The markings as far as we can tell are not CMF or Police Id's. Any ideas on what they mean or from.

I have pictures but can't upload then as the ole drag and drop does not work. About the limit of my technical know how.