Antique 1901 Chester 9k Rose & Yellow Gold Brooch By Frederick Sidney Banks. It has a wonderful floral design. It is fully hallmarked with "FSB", 9-375, the Chester assay mark and the date letter "A" for 1901. The pin is not gold. It measures 4.5 cm long approx. It weighs approx 2.9 grams. Excellent condition.