Pick No: 707K /BX [ERROR NOTE]
Serial Number: O.003 000 428555 K

* When Oberthur started producing the 500- and 1,000 Francs notes dated 1981, the print rotors for the first three digits of the serial number were stuck on zero. At least half of these denominations dated 1981 are error notes with the first three digits of the serial number as zeros.
the correct number of the above note should read: 4789368
Block A-D.001 = 4.000.000
+ 789.368
= 4.789.638