20 Kopecks postal stationery with overprint "PLESKAU / 60 kop", with advertising slogan 05, black hand stamp overprint, addressed and reverse inscribed, cancelled "PCKOB * K * 10 12 41" and "PCKOB * a * 10 12 41", photo expertize Robert Brunel VP (2025), "the condition is perfect, expertized Keiler BPP