If there is indeed a single collection of animals to be collected it is well this one! Overstolz is a German society of Margarine dating 1917. His creator is a ancient actor Heinz Engelmann.
The series consists of about 70 references 25mm plastic hard. It dates the 50s - 60. The 70th figure is a hut in 6 parts very difficult to find. The gate is also very rare. For the rest, it is a real treasure hunt, in the biggest pleasure of the collectors. It's enough to look at the figure number 11 to understand. The references 24 and 29 are rareless.
Small craftiness to value this series color version in a shop window, is to install a very sieved light. Curiously colors stand out in the point to make appear the relief animals.