Vieille Montagne Co
Societe des Mines et Fonderies de Zinc de la Vieille Montagne company of Angleur, Belgium, or ‘VM’ for short.
In 1896 they established a mine an processing plant in the small remote village of Nenthead in the Pennine hills of Cumbria.
1949 VM sold its mineral leases, plant and equipment and left.
More information here.