As one desiro is out of service and has been transported to Thessaloniki for repairs (serious engine problem which can only be repaired in Thessaloniki), one of the Athens Chalkida local trains is a double GTW until the Desiro comes back.
My first foto of GTW. Tithorea June 2004. The guys of this trial trip went to a tavern for "provatina" nearby, and came back after 2 hours and depart for AIR.