TANK RING holding in its center a pavé line of... Lot 15

TANK RING
holding in its center a pavé line of round brilliant-cut diamonds shouldered by a line of calibrated rubies (probably synthetic) and a line of gadrooned gold. Set in 18K yellow gold and platinum.
TDD: 53.5 (presence of a setting ring).
Gross weight: 30.28 gr.
A diamond, ruby, platinum and yellow gold ring, circa 1940.