The coal washing plant, the shower rooms, offices and the two steel shaft trestles above the Delloye pit No. 1 and 2 have been preserved.
The museum houses remnants of the mining past from the Nord-Pas de Calais basin, such as railway equipment, steam engines, etc., some of which still bear the stamp of Belgian constructors like Cockerill in Liège or Thiriau in La Croyère (La Louvière).