Until recently, Buenos Aires' A line still used original rolling stock from the 1910's. https://en.wikipedia.org/wiki/Buenos_Aires_Underground#National_patrimon

Until recently, Buenos Aires' A line still used original rolling stock from the 1910's. https://en.wikipedia.org/wiki/Buenos_Aires_Underground#National_patrimony https://en.wikipedia.org/wiki/Buenos_Aires_Underground#Natio... (photo: https://upload.wikimedia.org/wikipedia/commons/d/d4/Coche_La_Brugeoise_121.jpg https://upload.wikimedia.org/wikipedia/commons/d/d4/Coche_La... )