"Egr. Mr. Igorrock thank you for the translation. All this helps me, thanks to His and the interventions of the Other Experts, to better understand the rifle that I bought and ... to appreciate it more and more. Egr. Sig.Louis I could not give you an answer. The number 10635, preceded by the initials B.U., is printed on the shutter armature lever. Peter

P.S. As soon as my son decides to help me, I will try to post some photos."

Serial number BU 10635 tells that this rifle has proofed so early as 1905.