20 Kopeck postal stationery card with imprint "Pleskau / 20 kop", with advertising slogan 06, black hand-stamped imprint, with additional franking Pleskau Mi number 8, blank card, cancelled "PCKOB * K * 17 10 41", flawless condition, expertized by Dr. Rommerskirchen BPP and E Keiler, photographic finding by Robert Brunel VP (2025), "The condition is impeccable".