Hi all - have visited this site often and have finally signed up now that I have a question to ask.

I've seen several copies of the 13th UK impression of The Hobbit (1961) for sale saying that they come with a dust jacket saying 14th impression. My first assumption is of course that people have simply put the dust jacket from a later copy onto them. However, as I have seen several examples of this I just wanted to confirm that my assumption is correct or whether there was any sort of printing error involved with this impression's dust jacket?

Thanks!