60 Kopek registered postal stationery envelope with the overprint "Pleskau / 60 kop", black hand-stamped overprint, with additional postage Pleskau Mi number 11 Iy, with printing error I "Clock tower damaged on the left (Field 5)", cancelled with stamp "PCKOB * K * 9 1 42" and "PCKOB * a * 9 1 42", the registered postal stationery envelope is overfranked, excellent condition, expertized by Dr. Rommerskirchen BPP, photographic finding Robert Brunel VP (2025) "The condition is flawless".