C. 1950. Dating back to the Retro era, this Estate collection ring turns delicate tracery into elegant, wearable art. At the center, a singl… C. 1950. Dating back to the Retro era, this Estate collection ring turns delicate tracery into elegant, wearable art. At the center, a single sparkling diamond glows amid bright 10kt white gold filigree openwork. 5/16" wide. 10kt white gold filigree ring. Exclusive, one-of-a-kind Estate Jewelry.