SPAICHINGEN, blue one-line cancel on 3 Kr. On yellow, close to full margins, with additional raddle cross on cover with alongside blue L 2, \"SPAICHINGEN 3 Nov 1851\" to Tübingen from the well-known \"Hauff correspondence\", stamp and letter at upper margin continuously crease, top right small marginal notch, very rare, 1992 were only 3 covers known, photo expertize Thoma BPP