In this case you have spotted jewelry marks, that sound to me like a maker's mark. As you mention, this ring is 9 ct gold, it's investment worthy, as 9 carat gold is the hardest standard which mean it will last for hundreds of years.
I 'm assuming there is also a gold purity mark on the band somewhere attesting to the gold caratage, or did you take the seller's word for it :-(
Sometimes retailers and sellers don't know all that much about the items they are selling themselves, it's often a a case of plain, simple ignorance. Therefore, you have to be your own best guru.
This is the reason I created this website. Knowledge about antique jewelry and pearls is empowering and you will find the more you learn the more you earn and the more you will enjoy investing in antique jewelry and pearls.
Although I don't have a photo of this piece for photo clues, I don't think it's an antique gold ring. The marks you describe could be vintage jewelry hallmarks. Is it from the US? If so, you might like to compare the mark with the US Jewelry Marks 1922 on the Jewelry Resources Page.
