Now this is going to be a complete guess, based on the experience I've had with old documents, labels and the like. I would say that the label is from the 1850s, due to the edge decoration, although it might be photoshopped and distressed.
Very good! Probably 1855. See the link below for a better pic of a similar label:
Thanks. What makes you say the label has been washed?
The pieces are definitely Jaques, and look to be in keeping with the label - i.e. a very early set. (I know this from seeing the other photos). I suspect that the pieces originally came in a paper mache casket, these caskets are fragile and often didn't survive, which is why the box was replaced. That's my guess anyway. The box looks to me like maybe 1900 or so (judging by the hinges and the catch) but could be later.