A strawberry at a tree was a sign in the Noord-oostpolder (North-East Polder) that the farmer had some products for sale. You can see the sale in the background marked with a flag.
And these were the products, onions, potatoes, eggs and bottled applejuice. There was a price-list and you could put the money in the green box. The confidence in the countryside.
Linking to "signs, signs"