Most of the more obscure older B&O patterns have been counterfeited. Do not buy any pieces with a Homer Laughlin, BTC, or modern Hall China backstamp (the modern logo is television shaped - flat on sides, curved top and bottom).
(Note: The use of the word "counterfeit" to describe this china is not meant to inply that it is "good" or "bad" - for our purposes, the intentions of the counterfeiters are irrelevant. Authentic dining car china was made to be dining car china, counterfeit china was made to look like dining car china. Well done or not, it is not authentic dining car china, and if it is not clearly marked as a reproduction, then it is counterfeit.)