Vintage Pewter Beer Mug Vintage English Monogramed CS Beer Mug English Pewter. Marked on the bottom English Pewter Leonard Handmade in Sheffield England. The monogrammed lettered I am 99% sure say CSC. Ironically my brothers initials but, he’s not interested ha! So offering it up for grabs. It has one small dent along the underside rim as shown and pointed out in photos. Measurements Height: 4 3/4 inches Across Top: 3 inches x 3 inches