50 Francs Type 1966. 16.5.1966. Brown-violet and orange-brown on multicolor underprint. Arms at lower left center, King Baudouin I and Queen Fabiola at right. Four signatures: Marcel d'Haeze, Maurice Esselens, Emile Kestens and René Lauwerijns. Back: Parliament building in Brussels. Watermark: King Baudouin I in profile. Designed by Luc De Decker and Henri Schepers. Replacements notes: Series I and s/n begins with 9. Printer: BNB. 127,5 x 64 mm.