For four consecutive Sundays in December, subway customers can catch the “Shoppers Special,” a train consisting of eight cars from the 1930s that ran along the lettered lines until the late 1970s. The cars, which were ordered for the Independent Subway System (IND), were the first subway cars to be identified by their contract numbers, hence the R1/9 designations. R1/9 cars, known as ““City-Cars,” have rattan seats, ceiling fans, incandescent light bulbs, and roll signs for passenger information. Their design of more doors that were also wider and faster, plus increased standing capacity to accommodate crowds, served as the model of modern subway cars, and their dimensions are identical to the latest R160 cars. They were retired from service in 1977.