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0-4-0VBT Chaloner is an example of de Winton's distinctive vertical-boilered design, as used for many years in the North Wales slate quarries. It was built in 1877 at the Union Works in Caernarfon. (The former de Winton factory is located across the road from the present WHR station). It is believed to have been supplied new to the Pen-y-Bryn slate quarry, Nantlle, moving to Pen-yr-Orsedd nearby in 1888. It was obtained for preservation by Mr A Fisher and is normally based at the Leighton Buzzard Narrow Gauge Railway.
Chaloner was a visitor to the Ffestiniog Railway for the 150th Anniversary Celebrations in 1986. It returned in October 1986 for an overhaul at Boston Lodge, including fitting of a new boiler. Another of a number of visits was the Festival of Steam Gala, May 1997.
De Winton of Caernarfon, by Alfred and David Fisher and Gwynfor Pierce-Jones. R.C.L. Publications, 2011