Hi, I would like to ask for help identifying a golden ring. From what I found out, the hallmarks means 18k gold from Cairo, but I am not able to decode the date. It is not an "english" letter, so it is not 1917-1939, but i also does not seem to be an arabic letter. The ring is old, so could it be 19th centrury?
Any help will be appreciated
![Image](https://ekasparova.eu/tmp/ring1.jpg)