Hallmarked in London in 1699 by John Porter, this wonderful, William III Period, Antique, Britannia Standard Silver Mug, is straight sided, and features swirled fluting and bands of reed decoration to the body and a reed handle. The mug measures 3.75"(9.5cm) tall, by 4.5"(11.5cm) wide, by 3.5"(9cm) deep, and weighs 6 troy ounces.