IF YOU HAVE ACESS TO THIS CANNON PERHAPS YOU COULD TRY TO MAKE A TRACEING OF THE OVERALL DESIGN AND THE WORDS. THIS IS OFTEN DONE ON GRAVE STONES AND STONE CARVINGS AND SOMETIMES REVEALS MORE OF THE DESIGN THAN IS EASILY SEEN BY THE EYE. A SOFT LEAD PENCIL (THE BIGGER ONES ARE BEST) AND SOME APPROPRIATE PAPER MAY REVEAL THE UNSEEN OR NOT.

THE DESIGN SURROUNDING THE LETTERS MIGHT REVEAL SOMETHING AS WELL.