● 6 digit serial # with 2 capital Block
letters at upper left
● Double capital Block letters at upper right
(without serial #)
● the first digit of the serial # is always "0"
● The 1st Block letter
This note was issued with 10 different number ranges (one of 9.999 and
nine of 10.000), - each range having its own specific and unique letter.
Therefore, 10 different letters were needed. The origin of these 10 letters
is the Indonesian description of the note “SERATUS-TEMBAKAUAN"
(Hundred-Tobacco), because the note has a value of 100 Rupiah and shows a
picture of a tobacco field.
When the double letters are eliminated, it leaves 10 letters: "SERATUMBKN".
For the serial # ranges and the first Block letter the following "Huisman
Table" for fixed relation between serial # and Block letters is applicable:
● The 2nd and 4th Block
These letters have a fixed relationship,
with the 2nd letter alphabetically one letter higher than the 4th letter.
(When the 2nd letter is an "A" then the 4th letter is a "Z".)
In order to prevent confusion, the letter "J" is omitted, and the
combinations "JI" and "KJ" are not used, with "KI" substituted instead.
The letter "Q" and the combinations "QP" and "RQ" are not used (the
combination "RP" is replacing them).
● The 3rd Block letter
The 3rd Block letter only exists in fixed
combinations with the 1st letter.
The following "Huisman Table" is applicable:
for a note which could be genuine: 039628 AR - SP
● 1st Block necessarily letter "A", due
to number range 030000-039999
● 2nd Block letter "R" (given), thus the 4th Block letter is a "P" due to
the interaction between 2nd and 4th Block letter ("Q" to be skipped)
● 3rd Block letter "S", as the 1st Block letter is an "A"