MWM to modernise Sofia Metro rolling stock, Bulgaria March 26, 2020 | Europe Company News Metrowagonmash (MWM), Transmashholding’s subsidiary, has secured a contract from Sofia Metro to modernise an additional 40 Series 81-717.4/714.4 metro cars. The order is an option on a contract ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password