Sweden. Foreign-related cover. Potugal. Letter dated in Stockholm on 6.1.1807 sent to Lisbon. Postmark B.G.D. HAMBOURG / 1807. Jan. 16. R. 4 (Fe/Mü 1349-14) in red colour, used only during the period 20 January–18 February 1807 by the Grand Duchy of Berg P.O. in Hamburg – allegedly the only recorded on Swedish mail. EXHIBITION item. Ex. Klaus Michtner.
