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ANTIQUE VICTORIAN HANDMADE Lace Bertha Collar Faux Pearls Aurora Borealis AB Sequins Vintage Excellent antique/vintage condition. Covered in beads sequins and faux pearls. Approximate Measurements in pics. A bertha collar is a wide, flat, round collar that is often made of lace or sheer fabric. It is designed to accent a woman's shoulders and cover the low neckline of a dress. Bertha collars were particularly popular in the nineteenth century.