"Economy -the Nation's Duty" advert for Crelos Margarine proof

There is a black pen & ink style illustration of the Houses of Parliament and Big Ben at the top, underneath are the words Economy - the Nation's Duty. Economy, desirable always, is a National Obligation now. But economy in the food department calls for wisdom. Select only food that is pure and nourishing and sustaining - ' Sainsbury - quality' food. In thousands of well-managed homes Sainsbury's 'Crelos' Margarine is taking the place of Butter. Equal in taste, in wholesomeness, and also in nutritive power, 'Crelos ' Margarine shows you a real saving of 8 to 10d per lb.