Jewellery datecode?..

[Ylesiya]

Hi all,
Just struggling to understand coding for certain jewellery pieces. I have been trying to research online of course but at most the advice I got was that the codes are "A" for autumn, "P" for spring, "V" and "C". However, nowhere I found any info about the letter in front of the year code?
Example:

What does this "B" mean? Does anyone know? Does it mean that item is not authentic? It really does not look that way though!
Any advice much appreciated!

 

[ginatanzz]

Hi! I’m not an expert but I believe that the codes are the ones at the back of the cc logo. Here is the hook from my 20B bracelet...

 

[Ylesiya]

Hi! I’m not an expert but I believe that the codes are the ones at the back of the cc logo. Here is the hook from my 20B bracelet...

Thanks a lot!! Yours even has some "B" stamp on it - I wonder what is the meaning of those codes!
After inspecting some of my jewellery, I discovered that I also have a similar stamp...
Maybe someone else knows?..