The Hellenic Electric Railways (Greek: Ελληνικοί Ηλεκτρικοί Σιδηρόδρομοι, romanized: Ellinikoi Ilektrikoi Sidirodromoi, ΕΗΣ) was a private owned company member of British company "Power and Traction Company Ltd" which operated and extended the present Line 1 of the Athens Metro, from 14 April 1926 to 31 December 1975.
Share of the Hellenic Electric Railways Company Ltd., issued 14. April 1926Hellenic Electric Railways Company Omonoia station signal boxElectric freight railcar No 41 of the Hellenic Electric Railways.Electrical track diagram from the signal box of Faleron station of Hellenic Electric RailwaysHellenic Electric Railways wooden trainU-Bahn Athen Siemens-MAN EISAthens metro line 1 old system EIS 2Athens metro line 1 old system EIS
In 1926 the SAP S.A. was bought by the Power and Traction Finance Ltd and renamed as the Hellenic Electric Railways.[3] In 1926 the sister company Ilektriki Etaireia Metaforon or H.E.M., also part of Power Group, took over the 1,000 mm (3 ft 3+3⁄8 in) metre gauge Lavrion Square-Strofyli railway. This line was eventually converted to standard gauge, double track and became an extension of the existing line, reaching Attiki in 1948 and Kifissia in 1958.
^"Law 3920/2011: Consolidation, restructuring and urban development of transport of the Attica Region, and connected purposes". Government Gazette. Α (in Greek). 2011 (33). Athens: National Printing House: 1265–1276. 3 March 2011.
^S.A.P./E.I.S. also constructed and operated the Piraeus Harbour Tramway (1908-1960) and the Piraeus-Perama light railway (1936-1977). These were also standard gauge and were used by freight and service S.A.P./E.I.S. trains.
