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Lettersheet from Rothenkrug 21 July 1864 to Hadersleben, in the Duchy of Schleswig. 1 1/4 Schilling HERZOGTH-SCHLESWIG green and cancelled with postmark from the occupying Prussian forces 'K:PR:FELDPOST-RELAIS No. 16.' Only recorded town manuscript 'Rothenkrug' and only recorded example of 'K:PR:FELDPOST-RELAIS No. 16.', furhtermore here used as a extremely rare cancelling of a postage stamp.