10 Kopecks postal stationery with overprint "Pleskau / 20 kop", with advertising slogan 06, black hand stamp overprint, blanco card, cancelled by cancel "PCKOB * K * 4 12 41", with back additional franking Pleskau Michel number 10-11 x and Michel number 12 crossed, strong overfranked, very fine, photo expertize Robert Brunel VP (2025) "the condition is perfect