The smurfs have many times been used in promotions for chocolate candy, like for Waldbaur and Kwatta. But never for Cloetta as far as I know.
The reason for the picture is that I have been contacted by Cloetta and they wants to buy this old, large ”plate” or ”sign” from me for their new museum, which opens the 31th of March this year. I put a Waldbaur-chocolate-smurf in front of it so you can see the size. I agreed to sell it to them since I have 3 of them and it could also be fun when visiting the museum in the future seeing it. The company was founded by 3 swiss brothers in 1862. And has had a factory close to where I live since 1901.
Here you can read about the company history: http://www.cloetta.se/en/Cloetta-History.aspx