After the unprecedented success of the German commemorative pieces of 5 euros "Planet Earth" (2016) and "Tropical Zone" (2017), the third German play of 5 euros "Subtropical Zone" once again exceeded all expectations during its program in April. 2018! A unique feature of this edition is the translucent and infalcable polymer ring - in bright orange for the first time. An innovative masterpiece in the history of German currency. Unique in the world !