Heinrich Köhler 383rd Auction – Day 3 Single Lots: German Empire 1872 – 1945 German Reichspost – Shield Issues – The Michael Rehme Collection (part II)

1938, private postal stationery card Hindenburg 3 Pfg. "Briefmarkenausstellung Kurhessen-Thüringen" with picture "Löwenburg" in bluish grey and olive grey, each with overprint "3. Philatelistische Ostlandtagung" and corresponding special cancellation "KÖNIGSBERG 21.8.38", one card with minimally bumped corners, the other card with address, scarce