20 Euros Supernova

Austria's "Silver Niobium" collector series has run since 2003, but the Supernova issue steps outside that bimetallic format entirely. The Austrian Mint has leaned heavily into astrophysics themes across its science-focused issues, and a supernova is a reasonable subject — these stellar explosions are responsible for forging and dispersing most of the heavy elements present in coin metal itself, silver included.

KM#3378 had not yet accumulated significant secondary market data at time of cataloging.