Sweden. Foreign-related cover. Germany. Partly prepaid letter sent from STOCKHOLM 31.10.1843 to Rostock. Franco notation "bet Elsenour". Cancellations FRANCO HAMBURG (type 1, P: +2000), KS&NPC HAMBURG 7.NOV.43 and HAMBURG 7.NOV.1843. Postage due notation "4" (Hamburger Schilling). The Grand Duchy of Mecklenburg-Schwerin is R4 (4–10 recorded covers), of which this letter is the EARLIEST RECORDED mail to Rostock, according to Ferdén.