Chaldron Wagon Harton Colliery - Pack OThree wagon multi pack, NER 4T Chaldron Pack O: The Harton Coal Company With two sets of Staiths on the River Tyne, the area around South Shields was the centre of the Harton Coal Companys operations, its pits being linked by an extensive railway system. This system was electrified in 1907, and the Chaldrons were a common sight on the system until the inter war years, when the fleet was disbanded, with a number of differing lettering styles being