Marplatense" from Buenos Aires to the ocean-side city of Mar del Plata in Buenos Aires Province, Argentina; they were originally built for the Chesapeake & Ohio Railroad. Budd-patented processes and designs were also used in Brazil (by Mafersa), France, and Belgium after World War II to construct SNCF electric-powered multiple-unit cars, push-pull suburban trainsets, Wagons-Lits [CIWL] sleeping cars and even SNCF Class CC 40100, a small class of four-current six-axle high speed electric locomotives for Trans Europ Express service between Paris, Brussels, and Amsterdam and SNCB class 56 EMU. In Japan, the Tokyu Car Corporation became the licensee of the Budd process and made stainless steel commuter cars like its Series 7000. Mafersa continued to manufacture cars based on Budd designs, building 38 for Virginia Railway Express between 1990 and 1992, some now at Shore Line East. Canadian Vickers and Avco built cars and incomplete kit shells (for GE) under Budd license, including the 1980 PATCO Series II cars, Metro-North M-2 Cosmopolitan, and the Arrow II/III/Silverliner IV MUs. Budd also issued a licence to Australian manufacturer Commonwealth Engineering in Sydney in the late 1950s and 1989 for a variety of projects including the monocoque self steer V set double-decker interurban electric multiple units considered by many to be one of the world's most advanced double-decker designs. Budd's extensive research into the use of stainless steel carries on today in consulting businesses like Bay Rail. Rail Diesel Car In 1949, Budd introduced the Rail Diesel Car (RDC), a stainless steel self-propelled "train in one car" which expanded rail service on lightly populated railway lines and provided an adaptable car for suburban service. More than 300 RDCs were built, and some are still in service in Canada, the United States, Australia, Cuba, and Saudi Arabia. Similar but shorter cars were built under license by Mafersa in Brazil using the Budd Pioneer construction methods first used in 1956 on some of the later commuter cars, such as the Milwaukee Road gallery cars that operated out of Chicago and electric multiple unit (EMU) high-speed cars that operated between Washington, D.C. and New York City. The final few RDC cars were built by Canadian Car & Foundry under license from Budd. Electric multiple units In the late 1950s, Budd built the prototype Pioneer III. When re-designed and outfitted with electrical propulsion and end cabs as EMU coaches, six were purchased by the Pennsylvania Railroad for