20 Kopecks registered postal stationery with overprint "Pleskau / 60 kop", with advertising slogan 05, black hand stamp overprint, blanco card, with additional franking, Pleskau Michel number 10-11 y and Michel number 12 by, cancelled "PCKOB * K * 15 1 42", very fine, photo expertize Robert Brunel VP (2025) "the condition is perfect.