Vintage Three Stone Diamond Rectangular Plaque Ring in 18kt Yellow Gold

Vintage three stone diamond rectangular plaque ring in 18kt yellow gold. Set across the finger with three round brilliant cut diamonds in square collet settings, to a rectangular horizontal plaque ring featuring fine grain settings, three square raised millegrain borders and framed to the top and bottom with swirling engraved details, further enhanced with recessed shoulders with engraving and secured by a broad shank which continues to the reverse. Estimated total diamond weight 0.75cts.