Both the Taft and the Willis have been faked a lot, and usually the only clue is the creed stamping and, with the Taft, the way the strap is sewn on. That's why it takes photos of the actual creed stamping before we can say if a bag might be genuine.
Thanks so much for your response, Hyacinth. I am always looking out for (and sometimes bidding on!) the Taft bags on Ebay and didn't realize they were faked a lot! That is really useful info and I will have to be more careful from now on.