extravagant interior design, featuring exotic materials and UEC sent four of these trams to Buenos Aires for the AATC's consideration. Ultimately, the company chose to go with the Belgian trams and 125 of them were built to serve the line, although the four Preston trams were also kept to serve on the line. In 1927, the trams were converted to underground cars following the line's extension underground and abandonment of its overground segment. The UEC Preston cars ended service in 1977 and the three remaining cars are today used on the Buenos Aires Heritage Tramway and also for special occasions on Line A of the underground, such as during its 100-year anniversary. The Brugeoise cars remained in service until 2013, though numerous attempts over the years were made to either modernise the fleet (as was done with a few cars modernised by the Emepa Group in the 1980s) or replace the rolling stock completely. One such attempt to replace the rolling stock was with the purchase of 96 Alstom Metropolis cars in 2001, however these were ultimately assigned to Line D instead of Line A. After 96 years of continuous service, the La Brugeoise cars were nearing their final withdrawal from service in 2009. Spare parts for these trains were no longer available on the market so they had to be custom-made by request at Polvorín Workshop, where La Brugeoise units and other Buenos Aires Underground rolling stock were maintained and repaired by highly skilled and qualified personnel. At this point, it was already being discussed that these surviving vintage cars could continue operating as a tourist attraction on holidays and Sundays. According to Metrovías, the Buenos Aires Underground private operator, the La Brugeoise cars underwent a routine check-up every 20 days, while every four years heavy maintenance was performed. Despite their many years of uninterrupted service, La Brugeoise trains had one of the lowest mechanical failure averages in the network: 19 every 100,000 km. 2013–present By 2013, after nearly 100 years of continuous service, the Brugeoise cars were definitively withdrawn from service on January 12, 2013, 11 months before their 100th anniversary. They were replaced by new CNR rolling stock, which has been slowly introduced as units arrive from China. The original rolling stock has since been maintained, some in exhibition and some being converted to 1500 V to run tourist services on the line. In December 2013 a