5 R on 40 copy workers, dark brown-lilac, Type III, the silent postmark "14 5 42" and the fragments of the single-line postmark "Alexanderstadt" are genuine, on a piece of letter, rare, signed E Keiler and photo certificate Walter Zirath BPP (2025): "The condition is flawless and the perforation is typical. Due to the small edition, these stamps are very rare.", Michel 3,000.- - a rare stamp, hardly ever offered!