Budapest trams 4104 (Tatra T5C5K2), line 61, and 4145 (Tatra T5C5K2), line 56A, at end station Hűvösvölgy, 2020-02-02. The ČKD Tatra T5C5 series (bidirectional, but only with one cab and usually coupled back to back in pairs) was built 1978 to 1984 in 322 units, modernized 2002 to 2004 with chopper control (then called T5C5K). Further improvements were made from 2010, especially regarding the door control. So the type is now called T5C5K2.