15 Groschen, 30 Groschen, 60 Groschen and 70 Groschen special edition \"battle about kiev\" with overprint \"19. IX. 1941 / KNIB\", four values on cover with cancellation through official stamp and date line postmark \"19. IX. 1941\" (first day of issue), expertized Zirath BPP, expertise Robert Brunel VP (2024) \"the condition is perfect. \", rarely offered!