Perry & Co Brass Letter Balance PS57

Original, quality late 19th century brass letter scale of the pendulum balance form. This example is calibrated in old pennies and ounces and is for the postage rates from 1885 to 1897 and has the original steel letter clip and top split ring. The pendulum is impressed for the manufacturer "Perry & Co London". Originally nickel plated with traces still to the reverse and now polished brass and lacquered and complete and in good and working order.