The 20 Escudo denomination had been a circulating base-metal coin for decades by 1997, making its appearance in fine silver a deliberate collector issue rather than anything connected to everyday monetary use. Portugal was deep into preparations for euro adoption at this point — the Maastricht convergence criteria were actively reshaping fiscal policy, and the escudo had fewer than five years left as legal tender when this piece was struck.
The 20 Escudo denomination had been a circulating base-metal coin for decades by 1997, making its appearance in fine silver a deliberate collector issue rather than anything connected to everyday monetary use. Portugal was deep into preparations for euro adoption at this point — the Maastricht convergence criteria were actively reshaping fiscal policy, and the escudo had fewer than five years left as legal tender when this piece was struck.