Antique platinum diamond ring

This ring is amazing!  Antique platinum ring with a 1.20ct center diamond, .20cts in diamonds in the setting.  The center diamond is an old European cut, VS1 in clarity, F-G in color.  The ring measures just under 1/2" wide, it's a size 6 and can be sized.  Stunning period piece in amazing condition, circa 1920.