From Skoplje [Skopje] the Paris-Athens coaches, with perhaps some vans, are worked separately to Gevgeli, the Jugoslav frontier station, with a 45-min. stop, and thence, with Eastern European time, one hour ahead, on to Idomeni, where the Hellenic State Railways take over, and the Greek frontier formalities take place during another 40-min. halt.
Source: wiktionary