500 francs Type 1961 (1961-1975) Bernard Van Orley. 2.5.1961 to 28.4.1975. Blue-gray and multicolor. Bernard Van Orley at center. 4 signature varieties. Back: Margaret of Austria and Malines Palace façade at right. Watermark: King Baudouin I in profile. 147,5 x 74 mm. Designed by Florenzo Masimo-Bessi. Printer: BNB. No security Thread. Replacement notes: Series I and serial number begins w/ 9.

#135a: VIJF DUIZEND (error) on back.
#135c: VIJFDUIZEND (corrected) on back.