Hellenic Electric Railways

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.

The company was nationalised and replaced by the Athens–Piraeus Electric Railways, on 1 January 1976:[1] that company was later absorbed by STASY on 17 June 2011.

[2] 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.