Vintage diamond cluster ring. Set with four rows of three round brilliant cut diamonds in open back grain settings, twelve in total with an approximate combined weight of 1.50 carats, to a rectangular plaque cluster design featuring polished borders, a decoratively pierced gallery and open backholing, leading to raised shoulders with a foliate motif and flowing through to a solid flat shank. Marked 18 carat yellow gold and platinum, maker's mark 'J and F' with a ink bottle and feather quill, French, circa 1950.
