4 pfennigs black blue, right upper corner margin block of four with close separator line in mixed franking with 912 a, 919 a, 967 a and 968 a, cancelled by cancel "Munich PASING f 18.3.48", registered mail special delivery long distance cover of the first weight rate, properly franked, excellent condition, the block of four of the 914 b point at minimal brown perf tips on, remain of the stamps likewise aging traces, unsigned, certificate certificate -engineer Jan Hohmann UPf B (2024)