Drie Sleutels Les Trois Clefs Lemon VinegarOriginal vintage food advertising poster for Zele De Drie Sleutels Les Trois Clefs Three Keys lemon vinegar featuring an illustration of a flower as petals around a smiling lady's face with leaves as her hands holding a fork in a lemon and a bottle of vinegar in the centre of the citrus fruit against a blue lined background. Printed by Colier S A Gand. Very good condition, creasing.