Magdeleine Ducamp ( op. cit. p.271) puts this fan in the section “ grocer’s shop”, amongst the advertisings, more or less lucky, linked to the products sold in the shops of the time.
We’ll call them “stores”; here you could find everything, from medicine to shoes passing through food.
This fan advertised the drink Château Robert ,a naturally lemon or strawberry fizzy drink.
On the recto, there the name of the printing house “Bière” in Bordeaux.
"Details make perfection, and perfection is not a detail."
Leonardo Da Vinci