P.J.,
Ron was correct about the L.F. mark. It is for the Landj�¤gerei (rural constabulary) of the Prussian governmental district of Frankfurt am Oder. I can't positively identify the T. mark but wonder if it may represent the district of Trier. If so, it should have either an S. or L. in front of it. Any sign of an earlier mark being x'd out or ground off? Could you possibly post a photo of this mark?
Also, on the L.F. marked gun, I'm surprised there was no mag safety. Is it possible the cut was filled in? Is there a hole bored above the trigger and/or a notch in the upper left corner of the left grip?
You may find my article on Landj�¤gerei unit marks of interest:
http://forum.lugerforum.com/showthre...threadid=11898