Format 15.5x22.5 cm, single-sided print with handwritten signature. Good condition (small loss in lower right corner, soiling, fold marks).
Warsaw, dated November 17, 1939. Letter from Boleslaw Slepowron-Olszewski, commander of the Security Group of the Jozef Pilsudski Museum at the Belvedere, to a member of the group, Jozef Malowieski, conveying to him thanks from Janusz Regulski, commander-in-chief of the Civic Guard. Olszewski's handwritten signature under the text.