Vintage Unusual & Large Heavyweight 9k Gold Wedding Band Ring By Slade and Woolf, Size L. The ring is fully hallmarked with the makers mark "S&W" for Slade and Woolf, the crown mark, 375, the London assay mark and the date letter "c" for 1977. It is a very solid ring which has been beautifully designed. The band is approx 8 mm thick. It is size L. It weighs a very substantial 5.3 grams approx. This ring is in Excellent condition.