Germany - Federal Republic 1949 - 30 pfennigs UPU with plate error on document with first day postmark, Schlegel BPP photo certificate 116 I

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75 Years of the Universal Postal Union, 30 Pf blue with plate error ‘slanted line on the 0’. Clean on document with first day cancellation. (Michel for normal stamp on FDC: €1,400) . Deluxe quality with photo report by Andreas Schlege BPP. Very rare.