The drilled hole not withstanding, I have a problem with calling that a Finn Luger as nothing else that I see indicates that it is. There's no "SA" in the box stamp, the barrel isn't numbered to the gun and the "a" suffix is outside the 1923 Finn contract letters of k ~ t.
The barrel is stamped on the top with the circle-triangle-T Oy Tikkakoski hallmark. The Finns scrounged arms wherever they could find them, aside from the DWM new purchases. They were subject to hard use and armory repair. One has to wonder about the "matchingness" and the origin of some of these parts. Any markings have been ground from the receiver, and right receiver has what looks suspiciolusly like a Krieghoff five-pointed reject star.
A community dedicated to Lugers, Central Powers, Axis, Allied and related WW-I and WW-II pistols by their scholars, collectors, owners and enthusiasts. Come join the discussion about the history, technology and extraordinary background associated with these design masterpieces.