. Los Angeles jeweler Brock & Co opened in 1903 and thrived into the 1960s. This beautiful delicate platinum band has a partial hallmark for Brock & Co. Set with 6 single cut diamonds and 2 baguettes, approximately 0.10 carats. Size 7, easily altered. It is barely 2mm wide! Circa 1950, it is in wonderful condition. This will look so beautiful in a big stack of bands or next to your gorgeous wedding ring. It is up to you to have sized after receiving.