As a dealer lets me try to explain a little of the Brazilian notes.
The series of the notes are going from 000.001 to 100.000.
Being the largest number, one hundred thousand, we wont find the note 111,111 (hundred and eleven thousand, hundred and eleven), the closer number will be 011,111.
This way, Solid Numbers in the Brazilian notes, all ways will start with zero.
Starting from 1981 (except for Pick #197) the numbers of the series, were amended to the sequential numbers.
This way the Brazilian notes started to have 2 letters, one to the right, and other to the left of the number, they represent the Estampa.
From the ten digits, the first 4 digits, represent the series number, and the other six, the number of the note (the serial number), from 000.001 to 100.000.
In other words, after 1981 we continued having the possibility of having Solid Numbers, but with more difficulties of having beautiful numbers, because we have the 4 digits belonging to the series, at the beginning of the long number of 10 digits!
Any question, I am all ways happy to help.