SASSNITZ, 2 Pf. numeral in mixed franking with 8, 12, 20, 40 Pf. worker and 2 Pf. SBZ overprint on correctly franked registered cover to Berlin, faultless condition, photo expertize Maigatter BPP "genuine and immaculate, . . . The 2 Pf. numeral belongs on cover to the all large rarities of the district 38"