c1950's Platinum 0.25ct natural Ruby 0.2ct round Diamond s7.75 4.6g JR9835

Mid century Platinum 900 Rudy diamond lady ring. In the center prong set on natural  oval cut Ruby, weight 0.45ct, it embellished with twelve (12) full cut round diamonds, 1.1-1.5mm, weight approx. 0.2ct, eye clean. Ring top is 9.69mm, ring size 7.75, weight 4.6gm.