Tank-style signet ring in white gold (750) and platinum (850) with rectangular concave top centered on a round emerald cabochon in an octagonal closed setting, shouldered by half-rings paved with brilliant-cut diamonds in a grain setting. Circa 1940-1945. Gross weight: 12.9 g. Finger size: 46 (reduction bridge). Emerald accidented, and reattached, significant chips. Worn rhodium plating.