Your Luger was originally a LP08 (Artillery) model. It now has a barrel made by Tikka in Finland. I do not think it was ever a Finnish military piece as it does not bear the [SA] mark. The front sight has a similar appearance to a Tikka sight but I do not believe it is one. I see that there has been some effort exerted to move it, probably with a pin punch and hammer as evidenced by the deformation of the metal. It may not be a correct sight and therefore will not fit, but I think you could remove it completely from the left and clean up the slot and dovetail on the sight and try it again. You may have to touch up the dovetail with a fine file, but don't over do it. Good luck.
Ron
P.S. Gerben and Doug type faster than I do so they got their reply in while I was posting mine. Please excuse the redundant info!
