#2271-2275 Greece - Ancient Greek Technology (MNH)
2006 Ancient Greek Technology, Set of 5. Designs: 3c, Trieme "Olympias." 5c, Odometer, by Hero of Alexandria. 50c, Piston water pump, vert. 65c, Antikythera mechanism, vert. €3.80, Automatic temple gates, by Hero of Alexandria, vert.