1 1/4 Shilling (colour group a), plate flaw I \"B in Hamburg damaged\" (field 94), single franking on cover from \"Hamburg 28 / 10 66\" to Flensburg, lower left and top right is the stamp round corner, otherwise as well as the letter in in total good condition, photo expertize Lange BPP as 20 b PFI) and Volker Mehlmann as 20 a PFI \"a very rare cover. \"