After doing some internet digging, I found another Fraser trigger guard serial number very close to mine!. And the font is identical! I think Georgegibbs505 is right!
It must be a Fraser made rifle.
I will take it apart when I have it in my hands next week and will post more detailed pictures.
Thank you!
https://www.dropbox.com/scl/fi/tc2itfljm...05878o&dl=0