5 Pfennig - 40 Pfennig Liberty Bell (II), complete set of five values on two letters with a first-day special postmark from December 23, 1951, both sent as registered mail and each with an arrival postmark on the reverse, the lot with 5 Pfennig, 30 Pfennig and 40 Pfennig expertised Schlegel BPP, Michel 1. 000.-