The SNCF Z23461 automotor electric from 1937
The Z 23000 are the railcars of the Compagnie du chemin de fer métropolitain de Paris (CMP). They were ordered from 1934 to provide service to the Sceaux line in the southern suburbs of Paris, which was heavily modernized and electrified in 1937. Only made up of motor coaches, all identical, the Z 23000 constitute the first generation of modern self-propelled equipment designed for the future regional metro, which was not created until forty years later under the name of the regional express network. They remain inseparable from this line, better known during their fifty years of service under the name of “Z self-propelled”.