Coal company, of Mountain Ash, Glamorgan
Presumably the former Nixon's Navigation Co which was bought out of liquidation
1930 Agreement with other coal companies to form Welsh Associated Collieries
1933 Output of 2 million tons/year from Abergorki, Cwm Cynon, Deep Duffryn and Navigation mines at Mountain Ash, and the Merthyr Vale Nos. 1 & 2 mines.