Ex. collection Erik Lordahl and reproduced in his bookvol.2 part 1 p. 117 (top) and in the subsequent editions in CD format.
Po2aa. November 1939 – June 1941. Rarity 3.
Special cachets : SC3
On the obverse a large pencil drawing showing a man walking with a ladder on his shoulder and dated 1940. Probably an self-portrait done by the prisoner. “The Czechoslovakian prisoner Jan Frodl was arrested on September 1, 1939 and liberated on April 11, 1945 after more than 5 and one half years in KZ Buchenwald” (Lordahl vol.2 part 1 p. 22).