the metropolitan vickers coaches acquired to the british company run for the first time in 1916, when the retiro-delta branch was electrified. this wagons were introduced to replace the old steam locomotives still running in the line. during the 1950s, the possibility to close the branch to delta del tigre began to be considered by the national government. it raised due to the retiro-tigre branch run laid parallel to olivos station, carrying much more passengers than the first one. nevertheless, the project was not carried out during that decade.