1848 cover from the United Kingdom to Boston, U.S.A., marked 'per America' with manuscript '96' indicating total postage of 96 cents. Circular 'Liverpool AP 1 1850' datestamp alongside handstamped '76 Cents' exchange rate mark.

This cover reflects a quadruple rate charge: 4 x 24 cents, totaling 96 cents, covering U.S. inland postage (4 x 5 cents) and the remaining 76 cents for U.K. ocean postage and inland fees.

The high rate exchange marks are often difficult to find. They were used infrequently - this is evidence by the fact that the '96* here was endorsed by hand.