Authentic 18K yellow gold Tiffany & Co. double case diamond and enamel pocket watch / pin. There are 6 brilliant round diamonds ranging from 2 mm to 3 mm in diameter. This absolutely gorgeous piece measures 2 and 3/8 of an inch long. The case is 1.25 inches in diameter. There is a beautiful enamel bow in shades of blue and white, as the pin to this unique piece. The serial number is 65940. The watch weighs 44 grams. It is in great running order.