Re^3: Merging multiple variations of a serial number

It's OK I think if the leading digit of the 13 is a 1 or 3-9, but if it's a 2 then you have an issue. What does a 13-digit number starting 222 mean? I don't see how you can tell if that's MYY or YYX where X is the start of the core serial. Unless you have some other way to know?

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Comment on Re^3: Merging multiple variations of a serial number

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Re^4: Merging multiple variations of a serial number by LanX (Saint) on Jul 28, 2022 at 20:09 UTC
> Unless you have some other way to know? well the check digit at the end of 13 without leading month could give a strong indication, but the OP didn't tell us the actual check algorithm. edit And normally this kind of nonsense happens because someone changes the convention at a certain time. Like check digit introduced after March 2019, etc ... Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery}	[reply]

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Re^4: Merging multiple variations of a serial number
by LanX (Saint) on Jul 28, 2022 at 20:09 UTC

> Unless you have some other way to know?

well the check digit at the end of 13 without leading month could give a strong indication, but the OP didn't tell us the actual check algorithm.

edit

And normally this kind of nonsense happens because someone changes the convention at a certain time.

Like check digit introduced after March 2019, etc ...

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery}

[reply]