General Roca Railroad's trains number 318 from Tandil and 346 from General Alvear, consolidated as a single train from Cañuelas to its destination at Plaza Constitución terminal, pass Kilo. 5 Yard in the southern neighbourhood of the City of Buenos Aires. General Motors Electro-Motive Division built G12 #6552 in early 1957, a member of a 25-unit order.
