1920 - 1923, unused / mint never hinged and cancelled, partly double led collection with plenty of better issues right up to Michel no. 18 / 33 used expertized Dr. Petersen BPP, 40 / 46 used expertized Dr. Petersen BPP, 176 / 82 used expertized Dr. Petersen BPP, many expertized, interesting and rich collection on preprinted pages