M. Coulson and Co
of Merrington Ironworks, Spennymoor
1872 Mr. Coulson, Merrington Ironworks.[1]
1882 Coulson and Co, Merrington Ironworks.[2]
Up to 1895 operated Spennymoor Ironworks[3]
1908 M. Coulson and Co. Built headgear and screening plant equipment at Coxhoe Colliery.[4]