20 Drachmas (19XX) (type I) in copper-nickel. Temple of Apteros Nike and inscription "ΕΛΛΗΝΙΚΗ ΔΗΜΟΚΡΑΤΙΑ" on obverse. Head of Pericles facing left on reverse. Inside slab by NGC "MINT ERROR MS 65 / STRUCK 35% OFF CENTER". Cert number: 3934349-019. (Hellas 310 or 311 or 312).