6 and 12 pfennigs worker series, trial proofs on the original stamp, Michel number 944 and 947, so-called moirA(C) lines overprints, of the printing plant M. and T. from Bad Salzuflen from 26.3.1948, the 6 pfennigs stamp is mint never hinged, at the 12 pfennigs stamp was the gum near the insert to the marking soaked off. the Process is on file allocated, very fine, expertized Schlegel BPP, photo expertize Schlegel BPP (1979) "genuine, defects are indistinguishable", Michel 1.800.-