Solitaire diamond ring. Set with one round old cut diamond, J colour, SI1 clarity with an approximate weight of 1.26 carats in an open back claw setting, to an illusion design, intricate pierced openwork gallery with round backholing, tapered shoulders which flow through to a slim D-shape shank. Marked 18 carat white gold and platinum, maker's mark 'J C', circa 1935, accompanied by HRD Antwerp report #1800000160987.