Our keeper ring once had hallmarks but they are worn off, so we are estimating this ring to be from the late 1890's. Our ring has plaited gold work on the underside, a work of art of itself. A "Keeper" ring is a snug fitting ring worn to prevent the loss of a more valuable ring by keeping the larger ring from sliding off.
Keeper rings were also known as magic, or illusion rings, because of the illusion created by rotating the band causing it to appear to widen, to narrow, then to widen again. They were known as novelty rings and appealed to the Victorians love for novelty items.
This keeper ring is a US size 6 and weighs 3.5 grams.