New York City Transit 1956 Mack C49DT Old Look Buses Mack Trucks built the C49DT model between 1954 and 1960, and New York acquired over 300 buses of this type between 1954 and 1958. One bus, 6259, has been preserved in the vintage bus fleet. 1956 Mack C49DT Old Look 6259, September 13, 2003