Edwardian Niello Curb Link Chain signet rings Some wear to the stones

Some wear to the stones consistent with age - facet edge wear/pitting to the rubies and a couple of the diamonds have chipped tables

I suspect that

Marks: French control marks for 18ct gold (eagle head)

and confirm the gold is solid 22 carat

Edwardian Niello Curb Link Chain signet rings Some wear to the stonesCool antique curb link chain in niello silver and rose gold vermeil. It features plain rose gold curb link sections between longer links of niello and rose gold. Likely French, it dates from the early 20th century circa 1910 with both bolt ring and dog tag clasps. Era: Edwardian circa 1910 Length: 15. 5 inches Width of links: 3. 4mm Weight: 9. 2g Marks: Stamped 800 (silver) with rose gold vermeil Condition: Good antique condition. Signs of wear