Students demonstrating in the Hall of The Economic Minstry here yesterday , as the emergency meeting of the ' Group of Ten ' was taking place at the Bonn's Economics Ministry . The students numbering about 20 , were protesting against pressure on West Germany to revalue the Mark . The placard in the centre reads ' Wilson : Hands off the D Mark ' the Finance Ministers and central bankers from the Group of 10 - the world's leading non-communist industrialised countries - ended an eight hour emergency session earlier today without reaching any agreement , Bonn , West Germany . 21 November 1968