[alanint]

Dear Evren,
Your gun is a model 1908 luger, (no stock lug) with a 1910 chamber date. It is a military pistol, not a commercial. The rearmost link in the toggle is from a model 1900 Luger, (scalloped toggle ears) which includes an additional lock, which later models did not have. Your will notice that there is no corresponding latch shelf on the lower receiver for this toggle lock to latch into, (look for photos of this latch shelf in the Model 1900 section of this website). This mismatched piece was added to your luger as there must have been some damage or other problem with the original toggle piece. This was perhaps done at the time of the gun's restoration.
I imagine that you are using translation software in your post. I would love to know what "Forrest Foam" is!