The pin has a full UK hallmark for Birmingham 9ct date code C1913 the makers mark is slightly rubbed but I believe it says MB which I believe is for  Murrle Bennett . This Art Nouveau brooch is an exquisite piece of vintage jewellery crafted with 9ct yellow gold and a baroque pearl. The brooch drops 28mm and is  37mm in length and weighs 2.7g. It features a 5.5mm by 9mm length pearl. The brooch is a fine example of the Arts and Crafts era. It comes with a 60-day seller warranty from the date of purchase.