Do all Key pouches and pochettes have 3Y on the zipper?

I just bought a Mono Cles Key pouch for my niece while in Dublin and there is no 3Y on the zipper. I purchased it myself from the LV boutique inside Brown Thomas so it's definitely authentic but no 3Y.

Alright, thanks. That gives me peace of mind. The seller swears by it but, naturally, I have to run it by tPF. :smartass: