Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The R21 was a New York City Subway car built by St. Louis Car Company in 1956–57. The R21 was similar to the R17, except that it featured windows of a slightly different design. Two different propulsion system were used, Westinghouse (WH) and General Electric (GE). The R62A fleet started replacing the R21s in the 1980s, and the last revenue service was on December 30, 1987. The few remaining R21s are in work service. Former money train car 7194 is in the New York Transit Museum and is currently the only operating R21 on MTA property. Another car number 7267 is currently at the Concourse yard coupled up to R17 6895 and is classified as a Garbage motor. The mechanical condition of 7267 is unknown, but it's safe to assume that the car might be operational just like R17 6895 even though 7267 and the R17 have not moved around much for nearly a decade probably longer. What is to become of 7267 is unknown.

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