A diamond trilogy ring, total approx 1.75ct, all three old cut diamonds in collared mounts on a

A diamond trilogy ring, total approx 1.75ct, all three old cut diamonds in collared mounts on a yellow metal loop stamped 18ct, size M & approx 3.1g Stones are: 1 x 0.75ct & 2 x 0.5ct , all approx central stone and one side stone clear and nice colour, the other has some inclusions in but still nice colour.  mount shows signs of wear.