Authentic Art Deco old European cut diamond and sapphire engagement ring

This true antique ring is one of them. Set in 18k white gold the center center diamond is a perfectly faceted old cut diamond. If there are any inclusions on in it they’re almost invisible. The diamond measures .6 cts and is JK color. The fishtail prongs make it face up more like a 1 ct. The finger coverage is perfect. Scroll through the photos to see the presence on my 6.25 finger. On the sides are two synthetic sapphires which were very commonly used in 1920s jewelry. The entire ring 9.43 x 17.54 mm, it sits 7.47 mm off the finger, weighs 2.67 grams and is a size 7.75 but sizable.