Temperate zone, 5 Euro coin with polymer ring, brilliant uncirculated, Germany | 5 euro coins - climate zones of the earth | Current topics | Stamps Sieger
Bundesfinanzministerium - Vorstellung der 5-Euro-Münze „Subpolare Zone“ in der Humboldt-Universität
€5 collectors' coin series | Deutsche Bundesbank
5 Euro (Temperate Zone) - Federal Republic of Germany – Numista
5-euro coin polymer - Numismag
Münze Deutschland | 5-Euro-Polymerring-Sammlermünze 2021 "Polare Zone"
This is how coins with polymer ring are made: a visit to the Karlsruhe Mint - CoinsWeekly