An Art Deco Diamond Platinum Engagement Ring

Portuguese, circa 1938

The openwork platinum ring with a Greek key motif is centered with a bezel-set old European cut diamond (approximately 0.50 ct)

and is surrounded by numerous old single cut diamonds.

Estimated total diamond weight 1.60 ct

Marked with maker’s mark and Portuguese assay marks

Ring size 6 1/2 (17 mm)