The ISO 4217 code for the Greek drachma was GRD. ISO 4217 codes identify currencies with three letters, and GRD was the code used for Greece’s former national currency before the euro replaced it.
The drachma has roots in ancient Greek monetary history, but the modern Greek drachma was introduced in the 19th century after the creation of the modern Greek state. It underwent several periods of inflation, redesign and redenomination, yet GRD remained the familiar international code for the modern currency.
Greece adopted the euro for electronic and accounting purposes in 2001, and euro banknotes and coins entered circulation in 2002. The fixed conversion rate was €1 = 340.750 Greek drachmas. After the changeover, GRD became a historical or obsolete currency code rather than an active currency code.
The letters are easy to scramble: GRA, GRX and GDR are not the ISO 4217 code. “Drachma” can also refer to ancient units or earlier historical issues, but GRD is the standard code associated with the modern Greek currency.