Switzerland B329-B333, B329a booklet

Switzerland B329-B333, B329a-B331a booklet, MNH, $26.75. Michel 786-790y, 786-788x booklet, Euros 50.50. PRO Juventute 1963: Portrait by Albert Anker, Flowers. The stamps were printed on: Fluorescent (all) and Non-fluorescent papers. The booklet panes exist only on non-fluorescent paper. Panes of 4 each: B329a x3, B330a x3, B331a x1.