This antique Art Deco platinum engagement ring, circa 1920s–1930s, features a 0.64 carat Old European cut diamond at its center, graded I color and VS2 clarity, offering classic brilliance and vintage charm. The center diamond is set in a distinctive box style mounting, enhancing its presence and geometric appeal. Old European cut diamond accents line the shoulders, totaling approximately 0.18 carats and graded H–I color and VS2–SI1 clarity, adding subtle sparkle. Fine hand engraving along the shank completes the design, showcasing the craftsmanship and elegance of the Art Deco era. Ring size 5.75 and sizable.