Thank you very much for the help you are giving me
I can add that I'm looking up the serial number some initials: "WK" and very close a "LK"
Regarding cleaning the weapon, I preferred not to touch it, because as a weapon of almost 100 years, there will surely be some special product for this. (Please let me know if you know any good cleaning technique)
Again, thank you very much, and if they have more information I really thank for that