Trev is correct in that the marks are after 1916 and that the mark is probably Cairo but may be Beni Souef but the worn punch takes the detail out enough that one cannot be 100% positive, but the mark on the is not an 18k mark but a 12k mark. The Arabic characters, the number is read as a 1 and a 2, making it 12 carat. The hightest standard is 23 carat in Egypt, the lowest is 12 carat.
The center figure is the Ibis, the iconic bird for Egypt. It's stamp represents gold. Presently, the lotus palm is used for silver.
The third is a date character that I can only tell you that the use of the Arabic character was started in 1946.
In essence, your ring is 12k gold, made in Cario or Beni Souef after 1946.
Hope this helps!