80 h linden branch on local letter from Prague 4.3.42 to a authority, weight-related under-franked, postage due with 1, 20 Kc Prague 4.3.42, authorities numbers no postage due, the content was taken from, the void cover returned to the sender with adhesive label". is from sender. in postage due stamps to be glued", with 1, 20 Kc postage due stamp again postage due Prague 6.3.42, an extremely rare Process, fascinating postal history vertical trace of crease, legitimate condition