8 Pfg Porta Nigra in mixed franking with 8 Pfg 1. issue as well 2 Pfg buildings (2) on correctly franked franked cover from "HEIDELBERG 1 i 14.11.1949" to Mannheim, cover slightly blotched, photo expertize H. D. Schlegel BPP (2018) : "the quality of the stamp is perfect. The cover is correctly franked franked. ", Michel 700.-