The Arnine Cars (collectively referring to the R1, R4, R6, R7/A, and R9 car types) are a series of 1,703 subway cars manufactured for use on the IND System between 1930 and 1940. They remained in service until 1977. Although built under separate contracts and by three different manufacturers, the Arnines are mechanically similar to each other and only minor differences exist between the different car types. Twenty cars have been preserved, including several at the New York Transit Museum that are used on the Holiday Vintage Train and on other occasions.