Set Of Three Antique 1903 9k Gold Collar Studs By G H Johnstone & Co - Original Case. They are fully hallmarked with the makers mark "GJ" for "G H Johnstone & Co", 9-375, the anchor for Birmingham and the date letter "d" for 1903. They weigh a substantial 2.1 grams in total. They are in excellent condition and come in their original leather case which is in excellent condition