[4] Construction of Line A of the Buenos Aires Underground began on 15 September 1911, with the German company Philipp Holzmann being contracted by the AATC to undergo the works.

The workshop operates to this day (albeit in a more minor role) and was built in 1914 to service the line's La Brugeoise and UEC Preston rolling stock.

[10] The AATC remained largely independent, however in the post-war period, the political climate in Argentina had changed significantly and under the leadership of Juan Peron, the country's railways had been nationalised in 1948.

[12] That same year, the Argentine National Congress approved a law which would see the nationalisation of Buenos Aires' public transport in the shortest possible time frame.

The conflict ensued until 1963, when it was ultimately taken to the Buenos Aires Court of Appeals, which recognised that the Argentine state was partly responsible for the loss of capital of the foreign shareholders.

[13] Meanwhile, the UEC Preston cars belonging to the company are used on Buenos Aires' heritage tramway, which runs in the neighbourhood of Caballito using parts of the AATC's original route.