Vintage English Diamond Trilogy 18k Gold Castle Ring

Amazing castle details on either side of the diamonds and abbey window style cutouts on the sides! -Hallmarked Sheffield Rose "750" (18k gold from Sheffield), maker's mark "GS" and "DIA 0.25 -Tests as 18k gold -Size 5.5 and somewhat resizable (please inquire) -3.3g -Three round brilliant cut diamonds 0.25 tcw each measuring approximately 3mm in diameter -Setting is 4mm wide -Rises 3.4mm off the finger -Back of band measures 3mm