60 Kopecks registered postal stationery cover with overprint "Pleskau / 20 kop", black hand stamp overprint, with additional franking Pleskau Michel number 4-6, cancelled by cancel "PCKOB * K * 16 9 41" and "PCKOB * a * 16 9 41", the postal stationery cover is overfranked, very fine, photo expertize Robert Brunel VP (2025) "the condition is perfect