From what I know of these- and I have a few- this was just a design made by the artists themselves although I could see them as possible ornate Arabic calligraphy. I have seen some done this way from Libya and Ethiopia that were bought/sold as souvenirs to occupiers anyone from Italian to German - more likely- less common Americans but some still for sure UK too. Calligraphic designs were sometimes locations as I have come to learn but were often just designs or religious themed like Mohammed- name of prophet name of God etc. cool ring though for sure a keeper