backwards K attached to B. number 13. someone anyone?

The number 13 is blocked. May mean Finnish 1866 but can’t identify the other Mark. Appears to be a backwards K. Any info is appreciated.

Clear photos of the item & marks are essential for any possible help

I tried John, not smarter than the mobile site. Tried to upload from email and failed Will post tomorrow when I’m at computer. Thank you for your response.

Here is the first picture…