1889, lot of 8 sheet (100) express-package-traffic Oskar Hopf: Michel number 4 a, b, 5 (2 x), 6, 7 a (2 x) and 7 b, sheet Michel number 5 once 2 stamps and once 3 stamps out separeted otherwise complete with respectively without margin of sheet, partly separated, very fine / superb, Michel 10750.- (Image)