50 Heller delivery stamp vivid magenta with vertical overprint "Karlovy Vary 1. X. 1938 plus swastika" across of the right page, neat cancelled Karlovy Vary 1 4. X. 38 4 d on piece, issued only 232 examples, photo expertize Robert Brunel VP (2018) "the condition is perfect. With vertical overprint have up to now only three examples produced. ", Michel 2.500.-