Vintage Platinum Hand Made Natural Diamond Engagement Ring Mount

A grand natural diamond engagement ring mount crafted of platinum (stamped "PLAT"). Features 4 natural square cut diamonds weighing approximately .33ctw. The diamonds are VS-SI1+ in clarity and H in color. One of the diamonds has a small chip. The mount would hold an approximate rectangle gemstone measuring 9.5 x 7.3mm. Two smaller rectangle gemstones measuring approximately 4.4 x 3.8mm. Ready for you to finish. Ring size is 4 but has a sizing bead in the bottom of the shank. Weighs 7.2 grams.