Egypt 2/10 qirsh ?

https://en.numista.com/catalogue/pieces15241.html

I now have this - the thing is how do I know which exact date I have ?

Underneath the toughra (large squiggle/ signature) there is a regnal year numeral. That will give you the exact date, when you add it to the date on the other side.

aaaahhhhh.. that's great - I have a 1910 then Seems strange the amount of different rulers I have for close dates ! :S