The R42 is a New York City Subway car model built between 1969 and 1970 by the St. Louis Car Company in St. Louis Missouri serving the B Division (IND/BMT). This fleet was the first to be fully equipped with Stone Safety 10 ton air conditioning systems/units similarly found on the last ten (10) R38 and R40A cars. The R42 fleet is numbered 4550-4949.
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