10 Kopeck reply portion of the postal stationery card P13, with overprint "Pleskau / 20 kop" and additional Latvian postage Mi number 5, genuine black hand-stamped overprint, cancelled with stamp "PCKOB * K * -8 12 41" tied for philatelic purposes, flawless condition, photographic finding Robert Brunel VP (2025) "The condition is impeccable", examined by Dr. Rommerskirchen BPP