An antique late 19th-century Russian gold pin brooch. Rococo trefoil shape. Pink guilloche surface with a large central diamond and smaller cut diamonds along the rims. The Hallmark of 56 gold standard and makers mark KF is on the back side and on the pin. Weight: 14 grams. KF stands for Karl or Carl Faberge, a prominent Russian jeweler best known for the famous Faberge eggs. The item comes in the original box. Provenance: An Identical set of cufflinks was sold on Sotheby's Sale Russian And Silver V/O 23 October 2014 New York, Lot 14. Collectible Russian Luxury Jewelry.