What my mother told me:
Your great-grandmother believed that families were strongest when they worked together so each of her children had a role in the company. Oma Marie was responsible for purchasing supplies; your Oma for overseeing production. I remember following your Oma around the factory, she had a big book that had all of the secret recipes. She gave instructions for the preparation of ingredients, measuring out and mixing but in such a way so that the workers wouldn't know which product that they were making.
As children we used to play in the factory. The maids, drivers and other workers would look after us while our parents worked. I always had so much fun playing with all of the children there. Some were my cousins, some were the children of the workers. Your great-grandmother sent us all to the same school because she believed that whoever was smart enough would get ahead.