50 H. Blackish ultramarine with overprint in type I (dark rose) and 50 H. Vivid magenta with overprint in type I (dark bluish purple), tied by rarer not adapted postmarks "KARLOVY VARY 1 Karlovy Vary 1 / 4. X. 38 / 5 g" on letter pieces, issued only 214 sets, certificate Brunel VP (2019) : "the condition is perfect. ", Michel 360.-