On the flail, on one side a rocking weight to weigh either the guinea or the half-guinea; on the other side a sliding weight on graduations to weigh the gold.
Anthony WILKINSON (c. 1732-1801) was the inventor of this type of balance in 1797.
Circa 1790.
Dimensions of the closed case: 13.3 x 2.3 x 1.5 cm