A diamond single stone ring

A diamond single stone ringthe cushion-shaped old brilliant-cut diamond estimated to weigh 0.80 cts to the reeded shank, the interior engraved with clasped hands, initials and indistinctly datedring size O1/2., 3.4gCondition: A bright stone, I/J colour but probably drawing colour from yellow gold setting. Clarity SI due to gletz on kite facet and very small chip to girdle.Good reeded shank with sentimental inscription