Bidspirit auction | Germany - Proofs of pre-printed

Germany - Proofs of pre-printed stamps for stationery cards - 1939, National Military Competitions in Berlin, 6(pf) brown, perforation 13½, printed on thickened white paper without watermark, gummed, VF and very rare, expertized by E. Ludin, Mi #P271, Est. $500-$600