I think it said it was 2016I tried going to Fashionphile website to find out which year is the bag, but it's down.
Personally, i like the 2011 Papyrus. The one i had was a Folk & the leather was dreamy ........ Here is a link for you to check out Papyrus
https://www.fashionphile.com/balenciaga-agneau-giant-21-silver-velo-papyrus-91282
You can try