20 Kopecks postal stationery postcard red one-line overprint "PLESKAU", cancelled "PSKOW -a -9 8 41", the red single line cancel became after the occupation on all postal service pieces the in mailboxes found were to authority order mounted, there are only a few examples known and therefore are they very rare, unsigned, photo expertize Walter Zirath BPP "the card point at small traces of use on. ", Michel 4.000.-