The MP 59 is a rubber tyred variant of electric multiple units used on the Paris Métro system, and is the oldest type still in regular passenger service. Manufactured by a consortium between CIMT-Lorraine (body), Jeumont-Schneider, Alsthom and CEM (motors), they were first introduced in 1963 when the busiest routes of Lines 1 and 4 were converted to rubber tyred pneumatic operation. The trains circulated on Line 1 between 1963 and 2000, and Line 4 between 1967 and 2012. Today, 24 trains operate on Line 11.
Read article on Wikipedia