An original Himber wallet with a letter of authentication, note from Himber and an original book would be of interest; however, I don't know how much of an "original book" actually came with the original Himber wallets.
Since Richard Himber died about 50 years ago, I don't think I would actually want to USE an original Himber wallet, especially because some of the modern ones are really much more deceptive than the originals.
Beware items that purport to be completely original. Remember, anyone can take an original set of Himber instructions and put them together with a wallet that meets up with the description therein and add a letter of authentication which may or may not be genuine.
[i]The Himber Wallet Book[/i] by Harry Lorayne was published in 1998, over 30 years after Richard Himber died, so it would not have normally been included with an original Himber wallet when it came from Richard Himber. The Harry Loryane book is probably the best on the subject.