Can anyone help me decypher these markings... I'm guessing the 9CT means 9 karat gold, and the SIL is silver, but what is SIG?
Attached is a photo of the markings. The top of the ring is silver and the band is gold set with a single diamond.
The ring was my great, great grandmothers and is over 100 years old if that matters at all.
Any help appreciated, thanks!