HASTINGS - POSSIBLY UNIQUE? USE OF THE UPP MARK ON OVERSEAS MAIL - Apr. 1846 env. to Boulogne with "PAID/1D" UPP mark Jay SX630 incorrectly applied, so "1D" crossed through and prepayment of "5+5/10" endorsed at left; HASTINGS (back) and BOULOGNE (front and back) cds. Unusual and rare.Cross Reference: UNIFORM 1d POSTAGE PERIOD, FRANCE, OVERSEAS DESTINATIONS (Image)