I'm not sure if this helps, but I have a gold necklace and a gold bracelet that were bought in Southeast Asia and has a mark that says 75%. I was told it meant 18 kt gold.
The Hallmark, Gilbert Marks....london 1861- 1905
999 = 24 carat = 99.9% .916 = 22 carat = 91.6%.750 = 18 carat = 75%.585 = 14 carat = 58%.375 = 9 carat = 37.5%A gold item listed as .575 is 57.5% pure gold.Its worked out thus: 24 carat gold is pure...
Its the initials of the gold or silversmith's who made the ring
it means jewleryNo it means yoga... and crayons.