1930s Silver Filigree Bow Intricate Silver Filigree Bow Brooch circa 1930s. Beautiful piece in lovely condition. The brooch measures about 2" across. Filigree (formerly written filigrann or filigrane) is a jewel work of a delicate kind made with twisted threads usually of gold and silver or stitching of the same curving motifs. It often suggests lace, and in recent centuries remains popular in Indian and other Asian metalwork, and French from 1660 to the late 19th century.