Art Deco 9ct gold with a lovely Emerald surrounded by Diamonds

Art Deco 9ct Gold Ring with central Natural Emerald, surrounded with Diamonds on a Crown setting. All in excellent condition, no damage or losses, soft age patina to inner band, Hallmark partly rubbed but identifiable as British and an Anchor visible confirming Birmingham Gold Mark origin, and Initials advising Diamonds present. An excellent older piece with good Gem quality. Dimensions approx.: Ring Size “O”  or “7”; Band width generally 2mm at rear, tapering to point at each shoulder; Band thickness 1mm at rear 3mm at point of divided shoulders. England