100 Francs

Pick 134 ran for thirteen years across five distinct signature combinations, reflecting the revolving-door nature of Belgian central bank governance during a period when the National Bank was navigating the collapse of the Bretton Woods system and Belgium's deepening integration into European monetary cooperation. The Jordens & Ansiaux pairing alone appears across three separate dated issues, spanning 1968 to 1970.

The plastic-coated serial number variant — signed Jordens & Vandeputte — was an experimental durability trial, not a standard production run. It is the scarcest of the signature varieties and the most technically unusual note in the series.