The "Tropical Zone" is the first issue of the 5-part series "Climate Zones of the World" with a color polymer ring, the series is due to end with the "Polar Zone". The color of the translucent polymer ring takes inspiration from the typical climate of each zone (red for a hot zone, violet for cold). Each of the five mints Germany shapes the coin with a polymer ring in a different shade of red.

In 2016, the Federal Ministry of Finance of Germany issued the five-euro Planet Earth collector coin with a blue polymer ring connecting two metallic portions. It was a startling first in coin production, the innovative process having been developed by German press manufacturer Schuler AG. The transparent ring is made of a material that can be worked like metal but is actually plastic. It contains both a color pigment and security features. The joint between the polymer plastic and metal is just as strong as between the two different metals in conventional bi-metallic coins, such as the one- and two-euro coins.


Depicts a stylized heraldic eagle - Germany’s national symbol, date below and mintmark upper. The outer metallic ring features the 12 stars of the European Union, country name and denomination.

Engraver: Stefanie Radtke



The inner core features a parrot wings up in mid-flight. It appears to be preparing to perch as it opens its claws towards central motif, which consists of a "fisheye" lens point-of-view shot looking down through the forest canopy past the tall trunks of the trees to the earth below. Two smaller birds fly around the scene, presumably at a distance, thereby providing depth in an additional dimension. Engraver's mark "SR" is in-between trees.

The red ring defines the transition into an airy open space which makes the coin "gleam" effectively.

The obverse of the outer copper-nickel ring features four more small silhouettes of birds - one on the left and the other three against the rim on the right. The right wing of the main parrot extends through the red polymer ring, the tips of its feathers located on the outer ring. Along the lower left rim of the outer metallic ring is the inscription "Tropical Zone".

Engraver: Stefanie Radtke





5 Euro

Polymer Ring Coin
KM# 357
Type Commemorative Issue (Non-circulating)
Material Tri-Metallic
Outer ring Cupronickel
Inner ring Polymer
Center Cupronickel
Weight 9 g
Diameter 27.25 mm
Thickness 2.3 mm
Shape round
Alignment Medal
Bavarian Central Mint (D)
Berlin State Mint (A)
Hamburg Mint (J)
Karlsruhe State Mint (G)
Stuttgart State Mint (F)

Related coins

Polymer Ring Coin, Subtropical Zone

Climate Zones of the Earth

Tri-Metallic, 9 g, ⌀ 27.25 mm
Polymer Ring Coin, Temperate Zone

Climate Zones of the Earth

Tri-Metallic, 9 g, ⌀ 27.25 mm