The excavation at Ban Chiang in 1974/75 was followed by an article by Chester Gorman and Pisit Charoenwongsa, claiming evidence for the earliest dates in the world for bronze casting and iron working. This led to an at times acrimonious debate, between those who accepted these dates, and those who did not. Subsequent excavations, including that at Ban Non Wat, have now shown that the proposed early dates for Ban Chiang are unlikely. However, the early claims are still repeated in the secondary literature.