Irish Euro Notes - Europa Series

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JohnnyQ
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Re: Irish Euro Notes - Europa Series

Post by JohnnyQ » 28 Sep 2019 23:53

The pic was taken on the day it was posted. Notes are usually produced about 1 to 3 years before they are issued.

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Re: Irish Euro Notes - Europa Series

Post by DOC » 29 Sep 2019 11:51

JohnnyQ wrote:
25 Sep 2019 15:13
I’ve attached a pic of the packaging of a block of 1000 €50 notes printed in Portugal. You can see from the first and last note in the block the huge range included. Not all printers include this information on the packaging. Also included on the individual wrappers is the date they were wrapped. In this case 11-04-2016.
Yes, no doubt about it, that is a huge number range with more than 300,000 serial numbers meeting the checksum requirements. However, it does appear that only the digits marked in yellow are changing. In order to make sense of it, more information would be required regarding the serial numbers observed in the block.

MD 0 5 5 1 8 5 5 6 6 3

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Re: Irish Euro Notes - Europa Series

Post by JohnnyQ » 30 Sep 2019 14:40

There is no checksum on a euro banknote. If by checksum you mean a calculation it carried out on some of the numbers and the answer needs to be part of the rest of the number. This is how a bank account number works. They are not issued in sequence but skip numbers. Notes are printed starting 00000019 then 00000028 etc. The ECB doesn’t care if they are packaged in sequence. They simply remove imperfect ones and keep adding notes until they have the required amount.

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Re: Irish Euro Notes - Europa Series

Post by DOC » 30 Sep 2019 23:15

All euro notes conform to a checksum rule. However, the prefix letters also need to be factored in the calculation. The letters are converted to numbers using the ASCII coding system (see link).

https://theasciicode.com.ar/

The following link provides a worked example for a First Series note. Europa Series notes also conform to this system.

https://exclusivecoins.blogspot.com/201 ... tes-i.html

A consecutive ‘run’ of euro notes should differ in serial number by 9 and new notes often come out of cash machines in this way. As you have observed, the pattern may break down for longer sequences depending on how the bundles are assembled and how error notes are removed and replaced.

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Re: Irish Euro Notes - Europa Series

Post by JohnnyQ » 01 Oct 2019 23:44

Sorry DOC. I’m not doubting you but I’m struggling to grasp the concept a little. I’ve looked at the link you have posted but can’t see how the checksum works out for the numbers on the block. They add to 44 for me.

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Re: Irish Euro Notes - Europa Series

Post by DOC » 02 Oct 2019 20:25

No worries JohnnyQ.
There are a few different ways to check the serial number. Here is one method.
I have a First Series 20 euro note in my collection with serial T38362154793 and wish to check it.
First task is to convert T to a number by checking the ASCII Table.
The number corresponding to T is 84.
Then T38362154793 converts to 8438362154793.
Sum the digits 8+4+3+8+3+6+2+1+5+4+7+9+3=63.
This total of 63 should be 9 or a multiple of 9 which it is, so T38362154793 meets the checksum requirements.
Taking the next number T38362154794 and following the same process you get the following result.
Sum the digits 8+4+3+8+3+6+2+1+5+4+7+9+4=64
64 is not a multiple of 9 so not allowed.
The next allowable serial number is T38362154802 which is a step of 9 above the original number.
Summing the digits 8+4+3+8+3+6+2+1+5+4+8+0+2=54
54 is a multiple of 9, so allowed.
Hope this makes sense :)

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Re: Irish Euro Notes - Europa Series

Post by JohnnyQ » 30 Oct 2019 14:14

Came across an XZ €20 today. Another unusual Z to go with NZ that we had already seen. Also a new prefix letter H with a VH €20 note.

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Re: Irish Euro Notes - Europa Series

Post by DOC » 02 Nov 2019 11:37

Interesting to see use of the prefix letters H and Z. I wonder if there is a restriction on the second letter to ensure it is not the same as the first. Could we have ZZ for example?

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Re: Irish Euro Notes - Europa Series

Post by JohnnyQ » 04 Nov 2019 21:09

Now that you mention it I haven’t seen any notes with two letters the same.

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