Souvenir sheet issue German stamp exhibition DEBRIA with plate flaw I \"prominent white line over \'9.1\' of the date \'3.9.1950\' at the right sheet margin\" on registered First Day Cover with three-coloured first day special cancel \"LEIPZIG C1 / 26.8.50 / DEBRIA\", to Bernsgruen addressed, faultless condition, cover in the leftmost position tear and on the back hinge traces, rare on cover, photo expertize Weigelt BPP: \"the me presented souvenir sheet is including cancel perfect and genuine. The denominated souvenir sheet varity is rare on First Day Cover to find. \"