1850 (Apr. 19) Philadelphia, Pa. to London, England, folded cover sent unpaid with blue "Philada Pa. Apr 19" cds and matching crude "24" due rate h.s., New York large "21" credit h.s. to G.B., carried by Ocean Line Hermann from New York Apr. 20 to Southampton arriving May 7, London (5.8) backstamp and "1/-" shilling due rating, Very Fine, less than 6 examples of the large New York "21" debit h.s. are recorded. Estimate  $300 - 400. Philadelphia struck crude blue "24" handstamp to show letter being sent under 24¢ British treaty rate. New York applied the large black "21" debit marking since Philadelphia was not an exchange office for mails under this treaty. $0 (Image)