You're right, the bag is absolutely new, but I guess its design changed since 4 or 5 years, may be I'd prefer the 2017's one, but may be not. I consider that when you go to the official shop spending a big amount (at least for me) for an iconic bag, you are entitled to have the last version, and if not, to be informed of it.
I saw a third one ghw, started 21 ... But what you say about half moon wocs is very interesting; cause it would mean that mistake may occur and my bag could be from 2017.
The other point who´s bothering me is if one day, for some reason, I had to sell it, in spite of the bill, I'm fearful that I won't be able to sell it at the same price if it is from 2012 or 2013 rather than 2017.
Anyway, I'll let you know. ☺️