30 K. workers (Soviet Union Michel number 682), a so-called extreme rare through-runners, with authentic Cyrillic postmarks "PSKOW -9 8 41" in red and gray violet, letter of the first mailbox emptying! it was forget the new hand stamp overprint "Pleskau" from left at the bottom to the right above abzuschlagen! stamp perfect, cover with stronger traces of use, signed Dr. Schultz and photo expertize Walter Zirath BPP (2025) : " . those "through-runners" are very rare. " - great rarity of the area.