Old Gold Ring

[Tyas Paramita]

Hello, everyone, this is my story.

I inherited old gold rings from my late grandfather's. The ring have markings inside it;

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Do you have any idea what it's mean? There are three stones, that looked like a diamond. And from the cutting type (Googled it), it coming from Old European Cut.

I'm giving some pictures, I just want to know what the mean of the markings inside the ring. Thank you, everyone, for the help.

 

[theredspinel]

18ct means 18 carats (however gold purity is measured in karatage so it should be 18k). This denotes the purity of the gold.

However, 375... is the number to indicate it's 9k gold... 37.5 % pure gold.

So if it has both, I'm confused. Possibly fake gold ring.

 

[motownmama]

Is it "point" 18? i.e. .18 ct?