50 Heller stamp exhibition Kaschau, vertical gutter pair from right side margin with vertical, to the right lying dark pink handstamp overprints "Karlovy Vary 1. X. 1938 plus swastika", used Karlovy Vary 1 4. X. 38 4 d on piece, very fine, issued only 118 gutter pairs, expertized Mahr BPP and photo expertize Brunel VP (2014) : "the condition is perfect. So far eight piece with vertical overprints known", Michel 4.000.-