Wang Kapi Sugar Mill near Uttaradit operated a 750mm gauge railway with a metre gauge connection to the main line nearby. Several of the narrow gauge locomotives recorded here were 0-6-0PT delivered by Hudswell Clarke over the years to the Siam Forest Company Limited and the Anglo-Siam Corporation. According to the maker's list, they were delivered as metre gauge so must have been regauged when transferred from the forestry systems. There were also some 0-4-2T here, one of which may have been a Baguley (similar to the one at Lampang), the others from Orenstein and Koppel.

These were the three Baguley locomotives delivered to Thailand in 1921 to work on the construction of a 750mm line from Thonburi north some 30 miles to Bang Bua Thong in Nontaburi Province. They were retained after construction was complete and worked on the line until it was abandoned around 1940-2.