Antique half gill pewter tankard made in the USA. This holds five fluid ounces to the rim so may be a half gill bar measure. It is engraved “USA” and to the left are two pewterer touch marks. The first appears to be the initials RWB ( but I am not sure), the second is a symbol which is no longer distinguishable. It is 7.5 cm tall and c.6.5 cm diameter. Weighs 170 g. Well used but in good shape.