5, 30 and 50 Kopecks Soviet stamps with black typography overprint "Pleskau 20 kop" respectively "Pleskau 60 kop" on strong postage exceeding tariff rate registered cover, cancelled by cancel "PCKOB * K * 10 10 41", respectively "PCKOB * a * 10 10 41", sound, signed Dr. Schultz, photo expertize Robert Brunel VP (2025), "the condition is perfect