Berlin - corner margin, 1948-1990, mint never hinged quality collection, collected was uniform from of the left upper corner amongst other things Scharzaufdruck provenance 2 Pf. 5 M., 1 M. and 2 M. red overprint expertized Schlegel BPP, 5 DM buildings with photo expertize Schlegel BPP, green overprint, all buildings supplementary values, Stephan 60 Pf. 2 DM and from ERP obviously almost all better issues available, high catalog value