GMC TDH-5106 0919 began its career working for Fifth Avenue Coach Lines as number 3100. This was this was the first air conditioned transit bus produced in the United States when it was built in 1956. It endured into the mid-1970s with the MTA and the New York City Transit Police Department before making its way to the museum, an obvious candidate for preservation.

Bus Festival. On Saturday, June 10, 2023, the New York Transit Museum/Metropolitan Transportation Authority - MTA held a "Bus Festival". This display of the musuem's vintage New York City bus fleet at the Emily Warren Roebling Plaza underneath the Brooklyn Bridge in Brooklyn, New York was free to the public. The star of the show was recently restored MaBSTOA Flxible 4727 (111CC-D5-1), but it was joined by several other museum buses and newer vehicles. The museum fleet has more than 30 buses of different ages and manufacturers representing the history of the MTA and related private companies.