Switzerland - Pro Juventute / Patria, 1912-2007, two-volume cultivated collection, Pro Juventute from Michel no. 128 / 9.130 / 2 in each case mint never hinged and additional used (without souvenir sheet 6 used) complete, in addition to it an almost complete mint never hinged and used collection pro Patria, as well amongst other things souvenir sheet 2 and souvenir sheet 6 always mint never hinged and used, high catalog value