30 Pfennig black olive, white-gray paper with steeply rising grill, perforated L11, cancelled with an unidentifiable postmark - possibly a block of four cancellation, this type is rarely offered, photo certificate Erich Herpichboehm BPP "in flawless condition.", Michel price ** 6,500.-, used example not yet listed, which is understandable given the unidentifiable cancellation on this example.