30 Kopecks postal stationery cover with overprint "Pleskau / 60 kop", black hand stamp overprint, addressed, with advertising slogan 03, cancelled by "PCKOB * K * 15 10 41" and "PCKOB * a * 15 10 41" and registered cancel, all genuine, very fine, photo expertize Robert Brunel VP (2025) "the condition is perfect", expertized Keiler BPP