40 Pfg numerals with retroactive linear roulette 9 3 / 4 - postmaster separation Seiffen, variety "left and topless roulette", corner margin copy top left, neat cancelled with special cancel "Seiffen 21. 9. 45", photo expertize Ströh BPP: "genuine and immaculate. Cancelled stamps of this kind are rare. ", Michel 3. 000.-