New Haven "Beantown" bean pots have been reproduced, but the reproductions are fairly easy to spot. The originals are brown on top and beige below the shoulder, the reproductions are all dark colored. Also, the originals had underglaze rubber stamp decorations, while the repros have overglaze decal lettering, which is far too "perfect" (and would quickly fail the scrape-with-thumbnail test).
(Note: The use of the word "counterfeit" to describe this china is not meant to imply 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.)