18ct Uk hallmark inside the ring S letter hallmark for year 1918 Uk Chester hallmark No damage Size 7 1/2 A 1918 18ct gold and ruby ring hallmarked in Chester is a highly desirable, post-Edwardian antique, often featuring romantic, durable designs like gypsy or three/five-stone settings. These rings commonly include natural rubies (often July birthstones) and are prized for the Chester assay mark, which ceased in 1962.