B Series prefix research project • Remaining prefixes to be recorded

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Mac
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B Series prefix research project • Remaining prefixes to be recorded

Post by Mac » 24 Jan 2015 20:22

BSCAN is the on-going survey of B Series banknote prefixes. The goal is to fill in the missing gaps in recorded prefix information.
We have well over 99% recorded, just a few to go...

If anyone has any of the following prefixes, please post a picture of the note, or email it to:
lists AT irishpapermoney DOT com

£5 NOTES
22.04.87
DLF ELF GLF HLF ILF

07.05.93
We believe that the series ends with GKG. Has anyone got a note with a later prefix?

All prefixes of the following dates:
(Although these have been recorded, there may be others which escaped notice)
27.10.81
26.10.76
14.10.77
17.10.77


£10 NOTES
08.10.80 ACC
19.10.81 AEC BEC
25.10.81 HBC
28.10.81 BEC
04.04.86 IEH
01.02.88 FDH JDH
09.05.89 IBL KBL


£20 NOTES
28.08.86 AFE JFE LFE
28.10.81 KKE
11.07.83 KKE

Central Bank of Ireland Five Pounds, featuring Scotus.
Image

Central Bank of Ireland 10 Pounds, featuring Swift.
Image

Central Bank of Ireland 20 Pounds, featuring Yeats.
Image

Progress:
EDIT: Two £10 notes found, scratched from the list :)
EDIT: 13.02.15. Found another.
EDIT: 25.04.15. Found two £10 notes. ACC, BEC
EDIT: 28.05.15. Found KBL

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Re: B Series prefix research project • Remaining prefixes to be recorded

Post by Vellakare » 02 Jun 2015 02:52

I used to find it odd that the B series used a 3 letter code cypher. The first letter being the 12 Million A to L notes printed. Then the second letter being the date. Usually 12 Million notes were printed on a given date, unless it was the Pound notes, where the demand and requirements were MUCH higher.

It also 'skipped' in a random way. For example, on the last year I followed and tracked it, the Fiver from 07.05.93 (The last date) goes AKG then the next sequence back three letters AHG then AEG. Odd that.

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Re: B Series prefix research project • Remaining prefixes to be recorded

Post by Mac » 02 Jun 2015 23:37

You raise an interesting point. I'll have to dig out my original article on this and post it.

The sequence of the middle letter is actually quite logical.
It took me a while, but I worked all the sequences out back around 1996 when I was doing a book on Irish Banknotes, with the help of a friend who had been recording notes before I started. Basically it is as follows below.

The progression of a sequence is alphabetical, usually skipping one or two letters before using the next letter. When the sequence reaches L, it recommences at A again until all of the letters are used. Letters are not reused, and an extra letter will be skipped until the sequence falls on unused letter. Some of the sequences run backwards.

BASE LETTER: Third letter.
Generally remains the same until all sequences are complete, i.e, all letters A to L in the sequence are used up.

SEQUENCE LETTER: Second, middle, letter.
This changes almost always with each date of issue.

SUB-SEQUENCE LETTER: First letter.
Generally runs A to L for a sequence, giving up to 12,000,000 notes for each sequence.

Sometimes a sequence will adjust by skipping one or no letters so that the letter A may be used next.
The base letter is also generally used to decide the replacement note identifier.
There are anomalies, where bits of sequences are missing, and where left over prefixes are used on other denominations.

Example: £1 NOTES
First Sequence: (10.06.77 – 15.06.79)
Base letter µµB. Replacement BBB.
Sequence runs backwards.
(Letters in brackets are skipped)
L (JK) I (GH) F (DE) C (LAB) K (IJ) H (FG) E (CD) B (KLA) J (HI) G (EF) D (BC) A
Thus, we have: ALB-LLB (first date, 10.06.77); AIB-LIB (second date, 27.06.77); AFB-LFB (third date, 20.09.77) etc.

Thus, the 07.05.93 fiver is quite logical, when you run the sequence backwards, it is (letters in brackets are those that are skipped):
E (FG) H (IJ) K, backwards gives you K, H, G for the middle letters.
So you have AKG, AHG, AEG.

Great fun :D

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Re: B Series prefix research project • Remaining prefixes to be recorded

Post by Mac » 02 Apr 2016 17:54

JDH found!
Tracking down prefixes on a series that was withdrawn over 20 years previously can be a slow task.
Still, the occasional gap is filled as time goes on.

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Re: B Series prefix research project • Remaining prefixes to be recorded

Post by Mac » 30 Apr 2016 20:31

£20 prefix KKE found, for both 11.07.83 and 28.10.81.
Thanks to an eagle-eyed viewer for emailing me an image of the 28.10.81 banknote.
This confirms the record of 25 years ago, which unfortunately didn't include images! Pre-web or smartphone instant pic days.

Here is KKE, prefix split between two dates
Image
Ireland Yeats £20 1981, 1983, both with KKE prefix

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Re: B Series prefix research project • Remaining prefixes to be recorded

Post by Mac » 01 May 2016 13:20

£10 FDH reported by a forum visitor.
Thanks for that email.

That completes 01.02.88 for ADH to LDH :)

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Re: B Series prefix research project • Remaining prefixes to be recorded

Post by Series B notes » 21 Oct 2017 13:15

Today I saw a £20 replacement note, EEE prefix, date 25.08.83. Did you already have it in the census? SN was 481423.

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Re: B Series prefix research project • Remaining prefixes to be recorded

Post by Mac » 21 Oct 2017 22:24

Can you post a pic of the EEE replacement note, or email it to me please.

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Re: B Series prefix research project • Remaining prefixes to be recorded

Post by Series B notes » 26 Oct 2017 19:59

Hi, I sent the email. Did you receive it?

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Re: B Series prefix research project • Remaining prefixes to be recorded

Post by Mac » 28 Oct 2017 19:55

Yep, thanks for that.
I'll post the pic shortly.

Edit: Posted below,

Image

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