Sweden. Foreign-related cover. Germany. Cover sent from Stockholm to Hanover. Postmarks STOCKHOLM typ11 and HAMBURG.4. / B.G.D. 7.Mars.1807 (Fe/Mü 1349-20) in red colour, used only during the period February–April 1807 by the Grand Duchy of Berg P.O. in Hamburg – allegedly the only recorded on Swedish mail as well as the only recorded mail sent to Brunswick-Lüneberg before 1855. EXHIBITION item in superb quality. Ex. Gunnar Nilsson.
