Details
A proportional scale,
by W. & T. Avery Ltd, the beam marked Capacity 8oz. leverage value 12-1, the black-enamelled stand on mahogany base with adjustable feet; and a similar balance, the beam marked ratio 10-1 -- 18½in. (47cm.) width overall (2)
by W. & T. Avery Ltd, the beam marked Capacity 8oz. leverage value 12-1, the black-enamelled stand on mahogany base with adjustable feet; and a similar balance, the beam marked ratio 10-1 -- 18½in. (47cm.) width overall (2)