1 Mark German Reich with three line overprint as corner margin piece lower left with HAN "H 3610 20" and 3 Mark likewise from corner margin lower left with HAN "3614.20" in mixed franking with 15 Pfg (2), 40 Pfg (2) and 50 Pfg on postage exceeding tariff rate registered cover from Allenstein to Hanover, photo expertize Wasels BPP (2019) : "perfect", Michel for single stamp stamps 150.-