The ring is crafted entirely in platinum and has a low profile and simple geometric gallery. The sapphires on this ring appear syntethic as would be common in the period, except for one that appears natural and is likely a replacement. 

The diamonds total 1.30ctw  and all are old european cuts of high quality, H-J VS .

The ring is  sizeable and currently a size 7.75, faces 17.7mm by 14mm 

To be the best of my knowledge this is an original piece, not a reproduction Art Deco piece that are so scarce and hard to find nowadays, amazing ring.