Stomatol Sign

Translated from Wikipedia Svenska (article : Stomatolskylten)
The Stomatol Sign is Sweden's first animated commercial display and the oldest still working. It represents a toothbrush and a toothpaste tube of the Swedish brand Stomatol. It was first erected on November 22, 1909, on the old Katarina Elevator, in the area of Slussenområdet, Stockholm.