Bidspirit auction | Germany - Proofs of pre-printed

Germany - Proofs of pre-printed stamps for stationery cards - 1938, 5th Anniversary of power seizure by Hitler, 6+4pf green, similar to German stamp No. B116 (Mi #660), but with perforation 13½ instead of 14 and printed on thickened white paper without watermark, gummed, VF and very rare, expertized by E. Ludin, Mi #P267, Est. $500 -$600