50 Heller \"stamp exhibition Pilsen\", horizontal gutter pair with dark-rosa hand stamp overprint \"Karlovy Vary 1. X. 1938+swastika\", cancelled \"Karlovy Vary 1 4. X. 38 4 d\" on piece, faultless condition, issued only 110 gutter pairs, expertized Dr. Dub and expertise Brunel VP (2021) : \"the condition is perfect. \", Michel 600.-