Landscapes 45 heller brown red with perforation 11½, the so called "Banja Luka" perforation in seperated pair with left stamp perforated at 3 sides and the right stamp perforated at all 4 sides, very fine with 2020 Rüdiger Soecknick certificate, cat.v. 1200+ Perforated at 4 sides only a few in existance!