Early Victorian platinum old European cut old mine cut diamond cocktail ring

Set in platinum, the center diamond is an approximately one carat old mine cut diamond that is very clean, and very white. I would call it approximately K, and SI1 though I see no real inclusions. There is approximately 1.25 CTW of old mine cut melee accenting the ring. The entire ring measures 24.4 x 19.8, it weighs 4.6 grams, size a size 5.25,