Thailand Serial Numbers (Bank of Thailand)

Starting with the Bank of Thailand incarnation, the BOT has used the following scheme for assigning serial numbers to its banknotes. Exceptions to this include P-84, P-85, P-86, P-88.1, P-89.1-7, P-101 and P-106. Subsequent printings of P-88 (P-88.2 et al.) and P-89 (P-89.8 et al.) started with A/ก.

Thailand Serial Number Prefix Combinations

1st Printing - A/ก, B/ช, C/ค, D/ง, E/จ, F/ฉ, G/ด, H/ท, J/ร
2nd Printing - A/ร, B/ก, C/ช, D/ค, E/ง, F/จ, G/ฉ, H/ด, J/ท
3rd Printing - A/ท, B/ร, C/ก, D/ช, E/ค, F/ง, G/จ, H/ฉ, J/ด
4th Printing - A/ด, B/ท , C/ร, D/ก, E/ช, F/ค, G/ง, H/จ, J/ฉ
5th Printing - A/ฉ, B/ด, C/ท, D/ร, E/ก, F/ช, G/ค, H/ง, J/จ
6th Printing - A/จ, B/ฉ, C/ด, D/ท, E/ร, F/ก, G/ช, H/ค, J/ง
7th Printing - A/ง, B/จ, C/ฉ, D/ด, E/ท, F/ร, G/ก, H/ช, J/ค
8th Printing - A/ค, B/ง, C/จ, D/ฉ, E/ด, F/ท, G/ร, H/ก, J/ช
9th Printing - A/ช, B/ค, C/ง, D/จ, E/ฉ, F/ด, G/ท, H/ร, J/ก

Note: The letter "I" is not used.

Each series type follows this sequence through all signature changes. Only when there is a major design or series change does the sequence start again back at A/ก.

Each prefix combination yields 100,000,000 notes using 8 digits and 1 letter from 0A0000000 to 9A9999999. Each printing will yield 900,000,000 notes with a total of 8,100,000,000 notes possible. No single design has ever reached this amount. Solid 0 (zero) notes are usually if not always marked as specimen notes. With this scheme it is easy to decipher the actual number of your printed note. For example serial number 0A/ก0004198 is #4,198 and 5F/ฉ1234567 is #551,234,567.

Error notes are notated with the Thai letter being replaced by พ. In subsequent printings, error notes which would see a duplicate serial number with the Thai letter พ are further denoted by replacing the English letter with an S. For collectors who like scarcity, "S" notes are the most scarce of all the BOT notes.

In the case of commemorative notes there is only 1 English letter used, K for king, Q for queen and P for Prince or Princess. One exception to this was P-93 which had no letters. The Thai letter used starts from the bottom of the list starting with ร followed by ท and continues on up the list if there are more printings. For error notes, as there is only one English letter used in commemorative notes, a high number of error notes presents more of a challenge for not duplicating serial numbers. Error notes come with the following combinations: พ and the original letter (such as K, Q or P), พ and the letter S, and the original Thai letter with the letter S.

For some commemoratives, the Thai letter remains the same and the English letter is replaced with an R. This has been verified with P-105, P-117, P-123 and the new 100 Baht Rama X Coronation issue. These are believed to be replacement notes also, however as of this writing this has not been confirmed by the BOT (Bank of Thailand).

If anyone has additional information to add, please contact me and updates will be made. I will be updating individual pages with print amounts and prefix combinations for all P numbers as I complete banknote studies.

Hi - really useful info if I understand it correctly.

 

When you say 1st time do you mean in a prefix - if it extends beyond the 1st sequence of English letters, the thai letter sequence changes as you described in 3rd time and so on ?  Been trying to work the sequence out and this was hard to work out.  I was trying to compare to Comchai's possible combinations - for large ranges it wasnt working - so will try your info and s- I think that the B should be ข and not ช.  Kor Khai (egg) vs Kor Chang (Elephant).

 

So for example Series 15, 20 Baht, TB154 (Somchai TB), B171 (TBB),PICK - P109, Looking at Sig 74b

Somkid Jatusripitak / Pridiyathorn Devakula

Prefix range is this 0Aธ-2Eค, 8Aพ-9Aพ, 0Bพ-3Bพ (139) …… 139 possible sets …. but I have been it goes around …. A,B,C,D,E,F,G,H, (No I), J, Somethimes L.  Q,P,R,S Used in commemorative notes.  Sพ used for replacement / supplimentary notes.

 

THe previous signature gives me this (I got the right start and end - not sure about the middle part haha)

 

 

If  I use your sequence J/ร ….  but its meant to end on J/ธ 

 

When i get to the signature I mention - I got lost …. 

 

 

WOuld appreciate your  or anyone elses ;-)

I know one type of note that has exceeded the 9th printing, that would be the 20 Baht Series 15 note. The BOT ran out of prefix combinations to assign and therefore had to assign letters beyond the letter J going all the way to U.