Balance scales

Set of cast iron balance scales. Two removeable circular metal weighing platforms sit on top of an oblong metal base unit. Between the two weighing platforms is a balance position needle; in front of this below the weighing platforms are 2 sliding measuring scales with moveable metal weights, the top scale of which is for finer measurements and the lower scale for heavier measurements (both in grams?). On the front of the metal base unit is a black sticker with a silver printed inscription 'Gallenhamp MADE IN ENGLAND'. The right hand side of the unit features a plate giving details of the serial number.