"Redstone" is a 0-4-0 vertical boiler locomotive built by a Mr. Redstone, a foreman fitter at the Penmaenmawr Granite Quarry. It is a 1 foot 11 3/4 inch gauge replica of a 3 foot gauge De Winton used at the quarry. It was built for the quarry owners children in 1903 for use on a garden railway around their house then operated by Trefor Quarry near Porthmadog in the 1920's. It also was restored at Pant in 2012 and resides in the Pontsticill Museum.