Art Deco 9ct Gold ring set with an Emerald Cut Ametrine

Art Deco 9ct Gold Ring, set with a large Ametrine. The High Crown mounted design to give more light for the stone.  All in absolutely perfect condition. Clearly Hallmarked to the rear side with  375  within the Hallmark, confirming the 9ct Gold quality. Appears as European Markings. Dimensions approx.: Ring  size  N ½  or  7. Band width 1.5mm at rear to 5mm at uppermost step Shoulder; Band thickness 1mm at rear to 3mm at upper divided shoulder. Europe.