Georgian, George I, Britannia Silver Mug. London 1718. Charles Overing. 7 troy ounces.Georgian, George I, Silver Mug. Of plain cylindrical form with initials of MA to the front. Hallmarked as Britannia silver (95. 8% silver content) for London 1718. The maker's mark is partially obscured but can be read as the mark of Charles Overing. In excellent condition with light surface wear commensurate with age. Approximate weight is 218 grams or 7 troy ounces. Approximate dimensions are 9. 5 cm height and 7 cm diameter.