Question is: I would like to know date of manufacture.... cannot find my serial number. On left side of barrel are the letters K...E or perhaps B...R but no such serial number exists as such
The letter E or B or whatever it is, is only half punched.
See pic:

On left looks like a partial forge mark?
So, what is the serial number.... K ? R.... and what is date of manufacture?
What do you all think on this?
Thanks!
Jake