Old gold ring marking - just "22CT"

by Mark Lewis
(London, England)

I have a wedding ring given to me by my deceased grandmother. Her family had Spanish and Russian origins, but she was married in South Africa, around 1920-1925. The only mark on the ring is "22CT". It is very heavy compared with a modern 21CT ring, and looks and feels like old gold.

Can anyone please help with identifying this mark?

Thank you.